How to Calculate Roofing Costs per Square Metre

A new roof is one of the biggest investments you can make in any property. As such, when embarking on a roofing project, it’s vital that you fully understand the costs involved. To do this, you should understand how to calculate roofing costs per square metre.

The thing is, every roof is different. As such, there are a large number of factors which determine how much a roof will actually cost, both upfront and over the duration of its lifespan.

When you’re planning for a roofing project, it’s important to account for all of these, in order to ensure that you make the wisest possible investment.

Today we’ll look at how to do exactly that. Along the way, we’ll also look at some of the reasons that fibreglass roofs are the soundest financial decision for the Irish market.

Let’s look at how the costs of a roofing project are broken down.

Measuring a Roof

Obviously, it’s impossible to determine the cost of a roof without knowing its size and dimensions. Without knowing this information, it’s impossible for a contractor to give you a quote for your project.

For small roofs with simple shapes, this is a simple process. Recalling your maths lessons from school, the area of a square roof can be calculated by simply multiplying its length and breadth.

However, for larger roofs, or complex shapes, this is not so simple. Often, the best way to determine the size of a building’s roof is using the original plans. These can then be used by a roofing specialist in order to begin creating a quote for your roof.

If building plans are not available, you should consult with a contractor in order to acquire the necessary information to estimate the costs of your project.

However, the dimensions of your roof are only the beginning of creating a cost estimate. The exact cost of the project will also be determined by the scope of the required work. For example, with any roofing material, a project will cost considerably more if there are problems with the substrates as well as the roof itself.


To account for this, a materials list is used. To calculate roofing costs per square metre, it’s necessary to determine which materials are sold by the square metre, and which are not. Let’s take fibreglass roofing as an example.

Materials like fibreglass matting, resins, decking and topcoats are all sold with a specific coverage in metres. To calculate the per metre cost of each of these, their cost per unit is divided by their coverage.

This is then multiplied by the roof’s area, in order to estimate the total cost.

Other materials are not rated for a specific area coverage. For example, edging is sold to cover the perimeter of a roof. As such, the required amount of trim should be determined. The cost of this can then be divided by the roof’s area to work out the cost per metre.

Additionally, there are some materials and tools which would require a one-off purchase for DIY jobs. The need to account for these is eliminated by using an expert contractor for your roof installation.

Labour Costs

Like most building projects, a large portion of the price of a roof installation is labour costs. The truth is that installing any kind of roof is a difficult, and often dangerous task. Roofers are highly specialised professionals, so their time is valuable.

Most contractors bill their clients in days. You’ll receive an estimate of how long the project will take, based on its scope, as well as how many people will be needed to complete the job.

For example, a small fibreglass roof might take two people a full day to redeck, laminate and apply a topcoat. For more complex projects, additional labour costs may need to be factored in, including planning and design.

Modern fibreglass roof systems can also greatly reduce the need for labour costs. For example, Dryseal products only require mechanical fixing on site.

As such, it is best to seek out an estimate for labour costs from an experienced roofing specialist in order to gain a clear understanding of what your project will cost.

Other Project Costs

Often, there are additional costs associated with a roofing project, beyond materials and labour. These typically include things like scaffolding and skip hire. It might also be necessary to pay for other building services when a roof is replaced.

For example, if the previous roof failed, causing major leaking, it may also be necessary to contract specialist cleaners or interior decorators for your property.

These are associated costs of replacing your roof. While they do not factor into the project itself, it’s still vital that you budget for them, in order to gain a realistic picture of how much your building improvements will actually end up costing you.

Costs Over the Roof’s Lifetime

This is where most people misunderstand how to calculate roofing costs per square metre. Specifically, focusing on the upfront price of a roofing project is very misleading. Instead, it’s important to consider the lifetime cost of a new roof.

This involves factoring in how often repairs will be needed, as well as the overall lifespan of a roofing system. A system with a low initial investment may actually end up being considerably more expensive in the long run.

Let’s compare fibreglass and felt roofs as an example.

Installing a small felt roof might have half the initial cost of an equivalent fibreglass roof. However, felt roofs require constant upkeep and repairs, and may need to be replaced after as little as five years.

By contrast, the need to repair a fibreglass roof is rare, and it’s normal for the system to have a lifespan of around thirty years, with only basic maintenance needs. In this example, the fibreglass roof system would actually work out four times cheaper over its lifetime.

As such, it is a much shrewder investment for any commercial business or home owner.

The Best Way to Calculate Roofing Costs per Square Metre

Without consulting with a specialist contractor, it’s only really possible to estimate how much a new roof will cost. This is because the needs of individual projects can vary so much, and there are often roadblocks that only an experienced professional can foresee.

This means that, if you want to accurately budget for your roofing project, it’s vital to contact a reputable contractor to draw up a quote for your needs.

At Nationwide Fibreglass, we’ve been providing expert roofing service across the island of Ireland for over 12 years. Contact us today to ask about getting a quote for your next roofing project.

Why do Fibreglass Roofs Crack?

Fibreglass roofs are growing in popularity because of their long-term strength and reliability. A large part of this is resistance to things like footfall, weather and impact. However, issues do occasionally occur.

In this article we’ll answer a simple question – why do fibreglass roofs crack?

There are a lot of misconceptions out there about roof cracks. If you aren’t a fibreglass specialist, you could be forgiven for thinking that cracks are a result of strikes or falling objects. However, this is almost impossible.

With that in mind, let’s look at fibreglass roof cracks in more detail and bust some myths.

Understanding Why Fibreglass Roofs Crack

The vast majority of the time, cracks in a fibreglass roof are a result of poor installation. The tricky thing here is that anyone can go into a DIY shop and purchase the materials they need to attempt to install a fibreglass roof.

But this does not mean that just anyone can perform an installation correctly.

Roofs of all kinds have to withstand changes in ambient temperatures. Like all materials, the various layers of a fibreglass roof expand in the heat and contract in the cold. When the roof is installed, this must be accounted for.

Specifically, the right expansion gap must be left between the roof deck and surrounding walls, as well between different sections decking. These are then covered using expansion joints.

If an inadequate gap is left, the roof does not have the space it needs to expand and contract. This puts excess pressure on the roof itself, causing cracks to emerge in the topcoat.

Additionally, if the topcoat is applied too thickly during installation, there is an even higher chance of your fibreglass roof cracking. Again, an overly thick topcoat is not able to expand and contract sufficiently with changes in conditions.

How to Identify a Crack in a GRP Roof

The sooner you find a crack after it develops, the better. As we mentioned, cracks can indicate that the roof wasn’t installed properly, meaning there may be other issues. Cracks can also develop into more serious issues down the line.

As such, it’s vital that your roof is inspected regularly to look for cracks and other visible problems.

Most cracks should be visible with the naked eye. You’re essentially looking for areas where the topcoat appears to be splitting. This is generally not a neat line, so it should be fairly easy to spot.

You might also notice areas where the top coat of your fibreglass roof has a flakey appearance. This can indicate the same issues as cracking.

Alternatively, if you fail to inspect your roof regularly, you may begin to notice other problems which can indicate that there is a problem with cracks. The most obvious among these are leaks and ceiling mould.

What Happens if You Leave a Crack Untreated?

When left untreated, cracks can develop into a range of more serious roof problems, even where the roof is otherwise sound. For one thing, the longer a crack is left, the more difficult it will be to repair.

For another, cracks can easily lead to water ingress and leaking roofs, as the outer layer of waterproofing is compromised. This can also lead to problems with the other layers of your fibreglass roof, which may require a total reinstallation.

It also can’t be emphasised enough that cracks are an indicator that a fibreglass roof has not been installed correctly. This may indicate that other problems are also likely to occur, stemming from poor installation practices.

For example, if a roofer did not exercise enough attention to detail to add a sufficient expansion gap, there is a good chance that they also did not pay attention to other precise taks, like creating the fibreglass laminate.

As such, cracking can often be a strong indicator that a fibreglass roof is generally not sound.

What to Do if You Find a Crack in Your Roof

If you read online, you’ll find multiple sources telling you that cracks should be repaired by removing and reapplying the topcoat on the affected area. There is some truth to this, but it is far from the whole truth.

That is, if cracking occurs because the topcoat was applied too thickly in one isolated area, then this is a perfectly acceptable solution. If the entire topcoat is too thick, then recoating the whole roof is also a sensible fix.

The problem is figuring out the exact cause of cracks in a fibreglass roof.

As we know, cracks can also indicate that a roof’s decks were also installed incorrectly. If this is the case, reapplying the top coat will only treat the symptoms of the underlying problem. This is a bad use of time and money.

As such, when a crack is found, it’s important to consult with a professional fibreglass roofing specialist. If your roof is covered by a guarantee, you should be able to have any necessary repairs carried out by the original contractor.

If your roof is not guaranteed, or you have acquired a property with a compromised fibreglass roof, it’s best to seek out advice from a reputable and product-certified roofing contractor.

How to Prevent a Fibreglass Roof Cracking

As we said at the outset, cracks primarily occur when a fibreglass roof has not been installed properly. This includes DIY jobs as well as cowboy builders. As such, the only sure fire way to prevent cracks in a fibreglass roof is to leave installation to the experts.

Additionally, modern fibreglass roof technology greatly reduces the risks of cracks appearing. For example, Dryseal systems are mechanically assembled onsite, reducing the possibility of issues emerging from poor expansion gaps.

Similarly, RES-TEC roofing products offer industry leading crack-resistance, as well durability and strength.

Nationwide fibreglass have been providing high-quality, reliable roofing solutions all over the island of Ireland for over 12 years. In this time, we’ve provided countless commercial and domestic clients with reliable fiberglass roofs, which remain problem-free for several decades.

To discuss your next roofing project, get in touch with our team of experts today.

How to Fibreglass a Roof in 4 Steps

Fibreglass roofs are made up of several different layers, creating a strong, durable, and highly weatherproof system. To understand the role of each of these, it’s useful to at least grasp the theory of how to fibreglass a roof.

For the vast majority of people, the most sensible and cost-effective way to install a fibreglass roof is to engage an experienced specialist. This is because fibreglass roof installation is an involved process, and mistakes can lead to costly issues.

Additionally, improper installation is the most common reason for fibreglass roofs developing faults. As such, it’s always best to engage with a specialist fibreglass roofing contractor to discuss the needs of your product.

In this guide, we’ll cover the four main stages of fibreglass roof installation. You’ll gain enough of an understanding of how to fibreglass roof to allow you to make an informed decision about the needs of your building project.

It should be noted that this is the most common method for installing a wet lay fibreglass roof. By contrast, other systems like Dryseal roofs are mechanically assembled onsite

Let’s dive right in.

1. Fibreglass Roof Decking

Fibreglass roofs are built on a timber decking structure, which is typically made out of boards of oriented strand board (OSB). These are fixed perpendicularly to the roof’s joists or rafters. As such, before laying the decking, it’s vital to ensure that the existing structures are free from damp or rot.

When installing a fibreglass roof onto an existing building, there are two methods for laying the deck. These are:

  • Overboarding, where new decking is laid on top of existing decking boards,
  • Deck replacement, here the existing deck is removed entirely, and replaced with fresh material.

Overboarding can only be performed in very specific conditions, relating to the dimensions, material and condition of the existing deck. If overboarding is performed in the wrong conditions, it can lead to serious issues, which might lead to the entire roof needing to be replaced.

As such, it’s best to consult a professional on whether or not this is an appropriate strategy.

Similarly, roof decks need to be laid with a high degree of precision. Specifically, it’s important to leave what’s known as an expansion gap at the edge of the decks, where these are installed alongside a wall.

All materials expand and contract a certain amount due to changes in the ambient temperature. Failure to include a sufficient expansion gap can lead to cracking in the surface of a fibreglass roof, which can create serious problems if untreated.

2. Edging and Trims

Edging is then used to create a smooth and seamless effect on a fibreglass roof, as well as helping to ensure proper drainage. These are prefabricated pieces of fibreglass, which cover the edge of the roof deck.

Different shaped trims are used at different parts of the roof to aid the runoff of rainwater. Of course, this is particularly important for understanding how to fibreglass a roof which is suitable for the Irish weather.

Trims are generally fixed to the decking using galvanised nails or staples, although some require a polyurethane (PU) adhesive. PU is also used to join the trims to one another. The trims are then thoroughly sanded and cleaned with acetone before fibreglass bandages are applied to create a watertight seal against the decks.

A number of things can go wrong at this stage, which can lead to unsightly edges. In extreme cases, improperly fitted fibreglass roof trims can even lead to more serious issues. As ever, if you are not confident, it’s best to leave this to a qualified professional.

3. Creating the Fibreglass Roof Laminate

When trying to understand how to fibreglass a roof, many people are confused by the process for creating the laminate. Unsurprisingly, this is the part of the process which poses the greatest risk of creating serious problems down the line.

In theory, the process of creating a fibreglass laminate is relatively simple, but in practice a great deal of precision and attention to detail is required. To ensure proper performance and longevity To understand why, let’s look in more detail at each of the necessary steps.

Measure and Cut Mat to Size

Roofing fibreglass is most often sold in 1m rolls. A professional fitter will lay these out one by one, and cut them to fit your roof properly. Corner pieces are also applied to ensure a proper seal.

Once you have all of your fibreglass matting prepared, it’s time to start creating the laminate.

Mixing the Resin and Applying to the Deck

The matting is laminated with a special resin. This is mixed with a chemical known as a catalyst, which causes the resin to cure and harden. This is first applied to the deck. Once the matting is laid down, resin is then applied to the outer surface, in order to complete the laminate.

Modern resin technology, such as the Res-Tec range, is reinforced with fibreglass CSM to provide unbeatable resistance to cracks and damage.

While manufacturers provide recommended ratios for mixing the resin and catalyst, creating the right mixture is nonetheless tricky. The amount of catalyst will determine how quickly the resin dries, but this can also be affected by the temperature, airborne moisture, and even the time of day.

This is important to note, as insufficient resin coverage on the fibreglass laminate can lead to serious issues which compromise the performance of the roof. Here, there is really no substitute for experience with working with fibreglass.

Once the correct mixture has been created, a fibreglass roof fitter will then begin coating the roof deck with resin. Once a sufficient coat of resin has been evenly applied, they will then begin laying out the fibreglass mat itself.

Laying Out the Fibreglass Mat

While the first layer of resin is still wet, it’s time to start rolling out the cut pieces of fibreglass matting and applying the top layer of catalysed resin. Each roll of matting is laid down, and coated thoroughly with the correct quantity of resin.

As the laminate begins to turn transparent, a consolidation roller is used to ensure that the laminate sets correctly. In particular, at this point there is a risk of pinholes or resin starvation occurring, which can lead to leaks or water ingress in the roofing system.

In extreme cases, these might require the entire roof to be started from scratch.

4. Topcoating a Fibreglass Roof

The first challenge here is beginning the topcoating process at the right time. The surface of the fibreglass laminate should be sufficiently dry that it doesn’t feel sticky, but not so dry that the topcoat cannot bond to the surface.

Typically it’s best to apply the topcoat to a fibreglass roof within 24 hours of the top layer of resin being applied. This window of opportunity is shorter in hot or sunny conditions.

It’s generally a good idea to use topcoat and resin systems which have been specifically designed to work together, such as the CureIT range.

The roofer will begin by treating the edges and corners of the roof to remove any protruding material which could cause bubbles to form in the topcoat. The topcoat is then applied with sufficient thickness to ensure a clean finish and optimal waterproofing, while avoiding the risk of cracks to the surface from excessive thickness.

How to Fibreglass a Roof

One of the main reasons for the explosion in popularity of fibreglass roofs is their reliability and longevity. The simple fact is that a properly installed fibreglass roof is the most durable and damage-resistant solution for the Irish market.

However, to select a credible roofer, it’s important that you have a basic understanding of how to fibreglass a roof. This will allow you to understand the risks associated with each stage of installation, and choose a contractor who understands how to avoid them.

Nationwide Fibreglass are the top providers of fibreglass roofing products and services on the island of Ireland. We’re also experienced and registered installers of the top fibreglass roofing systems in the world. Get in touch with us today to discuss the needs of your fibreglass roofing products.

Flat Roof Repairs: Ultimate Guide

Depending on what they’re made of, many flat roofs are prone to damage and degradation. This is a particularly common issue in wet countries, like Ireland. As such, it’s vital to understand the basics of flat roof repairs, especially as roof faults can be an expensive problem.

Of course, there are a number of different kinds of flat roof systems. Each of these is prone to its own faults. Crucially, some flat roofs are more weather resistant than others. Additionally, different roofing materials have different life spans.

Today, we’ll cover everything you need to know about repairs to flat roofs, including identifying when a repair is necessary, as well as when it’s more economical to replace or even upgrade your entire roof. We’ll then explore some of the reasons that fibreglass systems are the ideal solution for flat roofs in Ireland.

Let’s start with the basics.

Why do Flat Roofs Need to be Repaired?

There are a few main reasons that the need for flat roof repairs can emerge. These are:

  • Damage,
  • Installation problems,
  • Normal wear and tear.

How much you need to worry about each of these depends on what your roof is made of. For example, EPDM roofs are extremely prone to damage, especially from sharp objects like falling branches. Naturally, this is a major issue for roofs in Ireland.

Similarly, felt roofs have a relatively short lifespan, and will require regular repairs and maintenance due to normal wear and tear, especially when they are exposed to wet and windy conditions.

By contrast, if you invest in a fibreglass roof, issues primarily arise when there is an installation problem. Typically, this is a result of the roof being installed by an inexperienced fitter.

Additionally, all kinds of flat roofs can be prone to issues relating to poor weather conditions when they are installed, like water ingress or trapped damp. The exception to this is modern fibreglass systems, which are designed to be designed in wet conditions, as found in Ireland.

One example of this is the Dryseal fibreglass roofing system.

No matter how a flat roof fault emerges, the need for a repair is the same. Leaving an issue unresolved in the short term will lead to damage to the contents of your building. If this continues into the longer term, you can also face serious structural damage to the building itself.

With that in mind, let’s look at some of the warning signs of flat roof faults.

How to Tell When a Flat Roof Needs to be Repaired

It’s important to realise that some flat roof faults are more easily identified than others. For instance, when your roof develops a leak, it should be obvious to just about anyone that a repair is necessary.

Other problems require you to specifically seek out.

However, it’s generally better to spot the signs of a fault before it gets to the stage where a leak develops. As such, it’s important to regularly check your flat roof for the warning signs of a leak. Your roof should be thoroughly inspected at least once a year.

Luckily, most of these are easy to spot with the naked eye. Issues which indicate the need for flat roof repairs to most materials include:

  • Pooling of water on the roof’s surface,
  • Cracks or holes in the surface of the roof,
  • Blistering or bulging,
  • Mould on ceilings or interior walls,
  • Lifting or damaged joints in the roofing material.

For any of these warning signs, the earlier you act, the better.

Can You Perform Flat Roof Repairs Yourself?

Damage to flat roofs can range from minor isolated issues, to much more severe problems. Minor issues with most flat roofing systems can be addressed by competent DIYers. Depending on the material, this typically involves either a roll-on sealant, or a patch-job to the affected area.

More serious issues can be addressed by a professional who specialises in the relevant kind of roofing

However, these kinds of repairs are only ever really a temporary solution. That is, if your flat roof is prone to faults or damage in the first place, then these issues are almost guaranteed to reoccur.

In trying to prolong the lifespan of your flat roof, it’s common to get sucked into a cycle of endless leaks and repairs.

Let’s look at the alternative to flat roof repairs.

Should You Repair or Replace a Flat Roof?

Like most building maintenance decisions, this all comes down to money. When a flat roof begins to develop problems, it’s worth considering whether it’s more economical in the long term to repair or replace it.

Repairing an existing roof might seem to be the prudent choice, but in reality, you’re often only prolonging the cost of upgrading your flat roof.

This is particularly true for less modern flat roof systems. For example, concrete roofs are relatively cheap and easy to repair, but they also offer poor insulation against the elements. As such, the money you save through short-term repairs may quickly be offset by other costs.

Similarly, felt roofs can have a lifespan as short as five years. In this time, it’s likely that repairs will also be necessary. By contrast, a modern system, such as a fibreglass flat roof has a lifespan of several decades, with little need for repairs.

As such, a fibreglass flat roof system will generally cost less over its lifespan than less modern roofing systems.

How to Prevent Flat Roof Problems

The best way to prevent problems which require flat roof repairs is to choose the right roofing system based on the local weather conditions. This is absolutely essential in a country like Ireland, which faces extreme weather conditions.

To prevent the costs and headaches associated with endless flat roof repairs, the best option for the Irish market is fibreglass. Specifically, fibreglass systems, such as Scott Bader’s Crystic Roof, are unparalleled for their weather resistance, low upkeep, and long-term affordability.

Additionally, faults with properly installed fibreglass roofs are incredibly rare. In fact, a fibreglass flat roof which is installed by experienced, product-certified professionals should almost never develop serious faults during its service life.

Nationwide FIbreglass have over a decade of experience of delivering high quality, reliable fibreglass roofing systems to domestic and commercial customers throughout the island of Ireland. If you’d like to discuss investing in an upgrade to your flat roof, speak to our expert team today.

Fibreglass Roof Bubbling – What is it and What Can You Do?

If you notice fibreglass roof bubbling, it’s normal to be concerned. After all, you’ve invested money in a fibreglass roof because of their longevity and reliability. It’s only natural that you’d be disappointed when a problem like bubbling occurs.

Generally, when a fibreglass roof is installed correctly, problems like bubbling should not occur. As such, if you notice bubbling in your roof, chances are that something has gone wrong during installation.

This highlights the fact that it’s always best to use credible, product-certified contractors on your fibreglass projects.

Let’s take a look at the causes of fibreglass roof bubbling, and what steps can be taken when it occurs.

What is Fibreglass Roof Bubbling?

Fibreglass roofs are made up of several layers, all of which play a different role. Bubbles occur when moisture or air is trapped between these layers during the installation process. Changes in temperature cause this moisture to expand, creating bubbles between the layers.

These resemble the air bubbles that you might find on a painted surface. As such, they’re pretty easy to spot with the naked eye. To find these, it’s important to check your roof regularly for visual imperfections or changes.

Depending on the extent of the problem, bubbles might appear in isolated areas, or all over the surface of your roof.

If left untreated, bubbles can contribute to a number of more serious problems. The thing is, bubbling is often a symptom of an underlying issue with your fibreglass roof. As such, it’s important to identify and treat the root cause of fibreglass bubbling.

What Causes Bubbles in a Fibreglass Roof?

So, what can actually go wrong which causes moisture to become trapped between the layers of your roof? The majority of time, this happens between laying the fibreglass matting, and applying the topcoat.

During installation, a coat of water-proof resin is applied to fibreglass matting, and the boards below, creating a laminate. The topcoat is then applied on top of this. When this process is done properly, there should be no moisture between the different layers.

If the resin is not given sufficient time to dry, or is not applied evenly, then moisture becomes trapped. If this is limited to the resin directly below the topcoat, it’s relatively simple to repair. However, bubbles can also indicate an issue with how the fibreglass mat was layed, creating a more in-depth repair job.

Fibreglass roof bubbling can also result from poor installation practices, like failure to properly clean the surface before applying the topcoat.

What Should You Do About Fibreglass Roof Bubbles?

When you encounter any kind of problem with a fibreglass roof, it’s important to seek out advice from an experienced professional. While there’s a good chance your roof will only require minor repairs, it’s still important to be certain of this before carrying them out.

A fibreglass roofing specialist will also be able to determine the root cause of your bubbling issue, and advise you on the best course of action.

Assess the Size of the Affected Area

As we said, most often bubbling occurs due to air being trapped between the topcoat and the fibreglass matting beneath, generally as a result of resin not being applied correctly. When this occurs it’s important to figure out how much of the roof’s surface is affected.

That is, you want to deduce if the problem is isolated to a small area of your roof, or if it occurs all over. This will help you to determine if minor repairs are necessary, or if an entirely new topcoat should be applied.

Minor Repairs

Assuming that the problem is moisture beneath the topcoat, and this is isolated to a small area, fibreglass roof bubbling can often be rectified with only minor repairs. Essentially, all that is needed is to replace the topcoat on the affected areas.

This requires the existing topcoat to be sanded away to reveal the resin below. This should then be thoroughly cleaned and dried, before a new layer of topcoat is carefully applied. It’s important that the new topcoat is applied to the correct thickness, to prevent cracks.

This process should be performed in dry conditions, to prevent more moisture from becoming trapped.

Replacing the Entire Topcoat

If bubbling is present across large areas of your roof’s surface, it may be necessary to replace the entire topcoat. That is, if the problem isn’t isolated to a specific area, it is likely that the entire topcoat has been applied poorly in the first place.

The process for doing this is essentially the same. The topcoat should be stripped off to expose the underlying resin. When this is fully clean and dry, a new layer of topcoat can be applied to the entire roof.

At this point, it’s worth remembering that your initial problem resulted from poor installation.

As such, it is not recommended that you attempt to reapply the topcoat yourself. In short, there is a good chance that the problem will reappear, defeating the entire purpose of recoating your fibreglass roof.

Instead, major repairs to your roof should only be carried out by reputable fibreglass specialists.

Bubbles Indicating More Serious Problems

As noted, fibreglass roof bubbling can also indicate more serious problems. The most common is that the resin beneath the fibreglass matting has also been applied poorly.

Bubbles can be a symptom of what’s known as resin starvation. Essentially, this is where the fibreglass matting has not been sufficiently coated in resin. The dry areas then allow moisture to penetrate the roofing system.

In the most extreme cases, the entire fibreglass roof system may need to be replaced to rectify this issue.

At this point, we should re-emphasise the importance of seeking advice from qualified professionals when you notice bubbling in your fibreglass roof. If you simply try and perform a DIY repair without understanding the ultimate cause of your bubbling issue, you may simply prolong or cover up an underlying issue with how your roof was installed.


How to Prevent Fibreglass Roof Bubbling

Ultimately, the best way to prevent fibreglass roof bubbling is to make sure your roof is installed correctly in the first place. The only way to do this is by working with an experienced, product-certified installer.

Additionally, choosing the right fibreglass roof products for your specific weather conditions can help to prevent bubbling. For example, preformed systems like Dryseal are ideal for installation in Ireland, given the frequent wet weather.

Bubbling between the resin and topcoat can also be prevented by using high quality products, which are designed to work together, such as CureIt fibreglass roofing products.

Nationwide Fibreglass are the top GRP roofing specialists, offering services to domestic and commercial customers all over the island of Ireland. If you need advice regarding your fibreglass roofing needs, don’t hesitate to get in touch and speak to one of our experts.

Understanding the Different Types of Garage Roof Material and Why Fibreglass is King

When it comes to choosing a garage roof material, many people don’t know where to start. However, this is a crucial decision, especially for people living in Ireland. That is, it’s vital to choose a roofing material that will withstand our intense weather.

Like having any other work done on your home, you should think of a new garage roof as an investment. It’s important to get it right the first time, in order to prevent wasted time and money down the line.

Additionally, many of us store our most prized possessions, like cars, bicycles, tools, gym equipment and even family heirlooms in our garages. You want to make sure you’re doing all you can to keep these things safe.

But with so many different garage roof materials out there, how is an ordinary person supposed to know what’s best for them?

Today, we’re going to look at some of the most commonly used materials for garage roofs. We’ll also discuss why, years of experience, we think a fibreglass garage roof is one of the soundest investments you can make.

Let’s dive right in.

Felt Roofs

Felt roofs are incredibly common for one main reason. They’re cheap. When it comes to purchasing a new garage roof, many people want the cheapest solution which will get the job done in the short term.

Generally, large felt roofs are installed by torching a roll of material onto the structure of your garage. This is then sealed at the edges, in order to prevent water from getting in. This makes them cheap and simple to install.

However, felt roofs have a number of major disadvantages, particularly for garages in Ireland.

For one thing, they are prone to nicks and tears. When exposed to the wind and rain, these can quickly develop into major damage, and provide poor water resistance. Because of this, felt roofs in Ireland might last as little as five years before needing major repairs or replacement.

Corrugated Roofing Sheets

A number of popular garage roof materials come in the form of corrugated sheets. The most common of these are galvanised steel and bitumen. The corrugated channels are designed to add strength, and encourage rain water to run off.

However, corrugated roofing offers notoriously poor weather resistance. This is because there is so much which can go wrong, including poorly driven screws, missing sealants, or damaged flashing.

Additionally, corrugated roofs have a known problem with moss and dirt build-up inside the channels themselves. These blockages can easily result in damage to the roof itself, meaning that the level of maintenance required to keep a corrugated roof sound is very high.

Finally, corrugated sheets can only be used on pitched roofs, making them entirely unsuitable for many garages.

Slate, Tile or Shingle Roofs

There’s no denying that tile or slate roofs are some of the most aesthetically pleasing options out there. In fact, one of the primary selling points of these garage roof materials is the fact that you can match them to the rest of your property. Obviously though, they can also only be installed on pitched roofs.

But how do tile or slate roofs perform from a technical standpoint?

Proponents of slate roofs often talk about how easy they are to repair. After all, all you need to do is identify the broken or damaged slate, remove it, and replace it with a new one.

However, these people miss an important point. Although slate roofs are easy to repair, the downside is that they require frequent repairs and maintenance to keep the elements out. Over the life of your garage roof, this can turn into a massive hidden cost.

As you can see, each garage roof material has its pros and cons. With that in mind, let’s take a closer look at why fibreglass is the best choice out of them all.

Why Fibreglass is the Perfect Garage Roof Material

At Nationwide, we provide fibreglass roofing systems because we genuinely believe that they’re the ideal solution to modern commercial and domestic building needs. Installing the right garage roof is one of the best investments you can make for your home or other property.

When choosing a garage roof material, there are a number of considerations to keep in mind. These include cost, performance, upkeep, longevity, aesthetics and strength. For garage roofs in Ireland, fibreglass offers the best balance of these.

Let’s take a look at how.

Water Resistance

Long term and reliable water resistance is the top priority when selecting a garage roof material, especially given the condition in Ireland. As we said, one element of this is keeping your valuables safe from the elements.

However, selecting a roof with reliable weather resistance is also important for preventing structural damage to the building itself. In fact, investing in the right roofing solution can prevent the need for costly repair work to your garage.

Fibreglass roof systems offer unparalleled weather proofing, and are resistant against common roofing problems like leaks and water ingress.


The important thing to consider when choosing a garage roof material is not just the initial cost of materials and installation. Rather, it’s vitally important to calculate the cost to install and maintain a roof over the lifetime of the building.

This includes factoring in things like the service life of the roof itself, maintenance and repairs. This might seem a little bit counterintuitive, so let’s take an example.

Say you’re choosing between two different options for your roof. Option A costs half as much as option B. However, option B will last three times longer. As such, when you factor in the service life of your roofing system, option A will actually cost you one and a half times as much in the long term.

For a real-world example, let’s say you’re considering whether to invest in a felt or fibreglass roofing system. Felt roofs can last as little as five years, while fibreglass systems generally last well over twenty. As such, fibreglass roofs are often much more affordable over their lifetime.

This is without even factoring in service costs, like repairs and maintenance.

As such, due to their long service lives, fibreglass roofs often work out as the most affordable options in the longer term. Besides this, improvements in fibreglass technology have significantly reduced the initial cost of fibreglass roofing over the last number of years.

Durability and Low Maintenance

Finally, one of the major selling points of fibreglass roofs is that, once they are installed, they require very little maintenance. This is because, when installed by a professional, problems with fibreglass roofs are very rare, due to their strength and durability.

On the rare occasion that a well-installed fibreglass does develop a problem, like a crack or leak, repairs are often very simple, as affected sections can generally be treated, without the need to remove or replace them.

For example, RES-TEC systems can be repaired without the need to even sand down the affected area.

This can be contrasted with the regular repairs and maintenance which are needs for other common garage roof material options.

Nationwide Fibreglass have over twelve years of delivering high-quality fibreglass roofing solutions for a range of commercial and domestic clients. Speak to our expert fibreglass roofing specialists to discuss the needs of your project.

3 Signs You Need Fibreglass Roof Recoating

Fibreglass roofs are made up of several layers. The exterior layer, also known as the topcoat serves a number of important functions, including weatherproofing, UV protection, and visual appeal. Occasionally, damage to the topcoat may require fibreglass roof recoating.

However, this is a little bit more complicated than simply applying a lick of paint. Indeed, recoating a fibreglass roof is a fairly involved process, which requires you to thoroughly sand and clean the existing topcoat, before applying the new layer with precision and accuracy.

As such, it is generally best to leave fibreglass roof recoating to experienced professionals.

It’s also important to note that applying a new topcoat is not a magical fix for issues with your fibreglass roof. While many DIYers attempt to save money on roof repairs by taking matters into their own hands, applying a new top coat may only cover up more serious structural issues.

This can lead to more costly repairs in the future. As such, it’s vital that you understand when you should recoat a fibreglass roof, and when you should not.

When is Fibreglass Roof Recoating Appropriate?

Although most issues with fibreglass roofing can be prevented with proper installation, occasionally problems arise nonetheless. SInce a fibreglass roof is made up of different layers, when a problem arises, it’s vital to figure out which of these is the culprit.

For example, many serious issues relate to the fibreglass itself, or the boards which support it. By contrast, some issues are limited in scope to the topcoat. The crux of this is that recoating is only an appropriate solution when you are sure that the topcoat itself is the problem.

The trouble is, when issues arise with the topcoat, it is difficult for most people to tell whether this is simply a surface level issue, or if it has been caused by a more serious problem with their roof.

As such, when you notice a problem with your fibreglass roof, it’s important to seek out professional advice, before attempting to mask over the problem with a new layer of topcoat. With that in mind, here are three specific cases where a fibreglass roof recoating is the right solution.

1. Topcoat or Resin were not Applied Correctly

The most common topcoat issues arise when the outer layers of a fibreglass roof have not been applied correctly. Here, fibreglass recoating is an appropriate fix, as the issues are with the topcoat itself, rather than with the underlying structures.

These can be avoided by using a certified and experienced fibreglass roof contractor. If your topcoat has been improperly applied, there are a number of warning signs. These indicate that it may be best to undertake a fibreglass roof recoating.

Specifically, if a topcoat has not been applied correctly, common issues include:

  • Flaking or cracks to the topcoat layer,
  • Delamination,
  • Streaky, patchy or milky appearance,
  • Excessive visibility of the fibre layer beneath the topcoat.

A flaky or cracked finish can often indicate that the contractor applied the topcoat layer too thickly, while excessive fibre visibility can indicate that the topcoat layer is not thick enough. Delamination, or strange appearance in the topcoat are often signs of water contamination.

While recoating may be the right solution to many of these problems, this is not certain 100% of the time. For example, an overly thick topcoat is just one of the causes of cracking in fibreglass roofs.

Equally, water contamination may occur when the topcoat is applied in wet conditions, or it might result from a more serious issue, like moisture in the boards beneath a fibreglass roof.

As such, it’s vital to consult with a knowledgeable fibreglass roofer before deciding to go ahead with a new topcoat, in case there is a more serious problem which needs to be addressed.

Consulting an expert will also allow you to choose the right roofing products to prevent future issues. For example, CureIt topcoat and resin systems allow year-round installation, through superior weather resistance.

2. Temporary Fixes for Damage, Cracks and Other Minor Issues

Sometimes, fibreglass roof recoating can be performed as a short-term solution while a more in-depth fix for roofing problems is planned. The idea here is to prevent further damage to the roof or the entire building before a more in-depth fix can be applied.

Of course, it is always preferable to implement a permanent fix as quickly as possible.

For example, leaks may occur as a result of cracks or pinholing, caused by poor installation of a fibreglass roof. Occasionally, it is not possible to immediately address the root causes of these issues, for instance due to erratic weather conditions or other practical issues.

Recoating can be used to prevent further damage in the immediate term. This keeps a building habitable until the ultimate cause of this damage is addressed properly by a professional fibreglass roofing specialist.

It’s important to note that replacing the topcoat should not be used as a long term solution to fibreglass roofing problems, except where the topcoat is the root cause of the issue.

3. Faded Topcoat Colour or Visual Issues

FIbreglass roof topcoats are often plain colours like black, grey or white. However, other colours are available. While the big selling points of fibreglass roofing systems are their durability and strength, aesthetics still matter.

In fact, many people opt for a fibreglass roof specifically because they offer a clean, modern effect. The quality of the topcoat makes a huge contribution to this.

However, over time, your topcoat may begin to lose its visual appeal. This may be as simple as acquiring scuffs and marks. Additionally, some cheaper topcoat layers may have poor UV resistance, leading to colour fade over time.

Alternatively, it’s not uncommon to decide to opt for an entirely different colour for your fibreglass roof, especially if you have recently become the new owner of a home or building. Modern roofing systems like Dryseal offer an impressive range of colour options, to suit every taste.

Fibreglass roof recoating is an excellent way to bring a new lease of life to your roof, even if it is completely structurally sound. As ever, applying a topcoat to a roof is an in-depth process, so it’s best to leave this in the hands of skilled professionals.

Fibreglass Roofs: Recoat, Repair or Replace?

When considering fibreglass roof recoating, the most important thing to decide is whether this is the right course of action, or whether a more comprehensive repair or replacement is needed.

Too often, repairs to the topcoat of a fibreglass roof are used, when in reality this is only covering up a more serious problem. At best, this delays the cost of fixing the core issue. Other times, it can even make the situation worse.

As such, if you are experiencing problems with your fibreglass roof, it’s crucial to speak to an expert about the best course of action. At Nationwide Fibreglass, we’ve over 12 years of fibreglass roof installation experience.

Contact us today to discuss your needs for fibreglass roof installations on the island of Ireland.

5 Common Fibreglass Roof Problems and How to Solve Them

Some of the main selling points of fibreglass roofing systems are their strength, durability and longevity. With proper installation and maintenance, almost all fibreglass roof problems can be avoided for the lifespan of the system  .

In fact, you can expect a properly installed fibreglass roof to last for decades without any issues.

With improper roof installation, a number of problems can occur. These are particularly common with unreputable contractors, or DIY installations. As such, it’s always best to use a product-certified contractor in the first instance.

However, let’s say you have had a fibreglass roof installed, and now it’s developing problems. You’ll almost certainly want to know how these can be repaired, or if you’ll need a whole new roof.

In this guide, we’ll look at five of the most common fibreglass roof problems, and what you should do when they occur.

Let’s dive right in.

Fibreglass Roof Cracks

Cracks on a fibreglass roof are easy to identify, as they are typically visible to the naked eye. In less extreme cases, you might also notice surface flaking before a full-on crack emerges. The sooner these can be repaired, the better.

There are two main reasons why cracks occur in fibreglass roofs. The first is that the top coat of resin was not applied correctly. Luckily, this is a fairly simple fix for an experienced fibreglass roof specialist.

The second reason for cracks developing in fibreglass roofs is a little bit trickier. Like all materials, fibreglass expands and shrinks a certain amount due to changes in temperature. An experience roofing specialist accounts for this during the installation process.

The problem arises when a roof isn’t installed correctly. Specifically, if there is no space between the perimeter edges of a fibreglass roof and the timber boards underneath, or if the wrong boards were used entirely, cracking is likely to occur.

Here, the solution is more involved. Indeed, as the problem here relates to the boards, then it is these which will have to be replaced, before a new fibreglass roof can be installed properly.

This problem can also be avoided using a crack-resistant fibreglass roofing solution, like RES-TEC.

Leaking Fibreglass Roofs

A leaking roof is a very serious problem. It’s not just the cost of repairing your roof itself. There is also potential for damage to the rest of the building, as well as its contents. As such, when you notice a leak in your roof, it’s crucial to act quickly.

Leaks can be related to a range of other fibreglass roof problems.

No matter what the cause, your first priority is to use a bucket to catch the water, to prevent it from damaging anything else in your property. Once you’ve got everything cleaned up, you should contact a fibreglass roofing specialist as soon as possible, to prevent the leak worsening.

The longer you leave a leak untreated, the more difficult and expensive it will be to repair.

It’s worth noting that leaking roofs can have multiple sources, some of which may be difficult to find. A professional fibreglass roofing company can identify these, as well as what caused the roof to begin leaking in the first place.
They’ll then offer a quote to begin work repairing your fibreglass roof, or if necessary, replacing it entirely. In this instance, you should choose a roofing system with high leak-resistance, such as a Crystic Roof.

Fibreglass Roof Pinholes

Pinholing is one of the most common fibreglass roofing problems. This is when small holes appear in the top layer of resin on a fibreglass roof, resembling pinholes. Most often, this occurs when the resin has been improperly applied, or the coat is not thick enough.

While pinholing may appear to be a relatively minor issue, leaving these holes untreated can quickly lead to more serious problems, like leaks or water ingress. Pinholing is particularly serious for fibreglass roofing in Ireland, as rain and wind can exacerbate the problem.

It’s fairly common for people to try and perform DIY repairs on fibreglass roofs with pinholes. However, we wouldn’t recommend this. While pinholes are a simple fix if you know what you’re doing, things can still go wrong.

The repair involves applying new resin to cover and fill the pinholes. However, if you use too much or too little, additional problems can arise.

Water Ponding

Ponding is a problem which is common to flat roofs. Essentially, this is where pools of water form, because they are unable to drain away properly. In many cases, this is nothing to worry about. However, it might be unsightly, or hazardous for anyone walking on your roof.

Pools of water can form as a result of dips on the surface of a fibreglass roof. This can come as a result of an uneven surface, poor installation, or damage to the roof itself. As such, water ponding can be an indicator of underlying issues.

If ponding results from a serious underlying problem, a contractor will need to remove the affected area of your roof. They’ll then use wooden shims, known as firings, to raise the area underneath, before replacing the missing roof sections.


Top Coat Alligatoring

Even the best fibreglass roof system won’t last forever. While the best fibreglass roofs have a life expectancy which you can measure in decades, at a certain point they will still need to be replaced.

One of the key fibreglass roof problems which indicates the need for a replacement is known as alligatoring. This is when the surface of your roof begins to appear shrivelled and cracked, but like the skin of an alligator.

Alligatoring occurs because, over time, the roof’s top coat begins to lose its elasticity.

While it may be tempting to try and use recoating as a quick fix, the only long term solution for alligatoring is to fit an entirely new roof. At this point, it’s crucial to speak to a specialist contractor to figure out which new roof is right for you.

The Best Way to Avoid Fibreglass Roof Problems

As we noted already, fibreglass roofs are growing in popularity because of their strength, durability, and longevity. Indeed, when a fibreglass roof is installed properly, you can expect it to last several decades without any issues occurring.

When you do encounter fibreglass roof problems, these commonly result from improper installation. As such, the best way to avoid creating unnecessary headaches and wasting money is to employ expert contractors in the first place.
At Nationwide Fibreglass, we’ve been delivering expertly fitted fibreglass roofing systems to customers all over the island of Ireland for over a decade. Speak to us today to discuss the needs for your roofing project.

Why We’re Offaly’s Number One for Fibreglass Roofing


Offaly is best known as Ireland’s hidden gem, with its beautiful scenery boasting its appeal to tourists and residents alike. At Nationwide Fibreglass, we want to contribute to the beauty of Offaly, supporting homes, buildings and organisations both structurally and visually. 

As we are based in the heart of the Irish midlands, making the domestic and commercial residences of Offaly look pristine and stay preserved is at the heart of our practice. That’s why we’re the best option if you are looking to renovate your roof. Here’s a couple of reasons why you should choose Nationwide Fibreglass for flat roofing installation and construction services in Offaly:

We’re convenient

Our central location makes us accessible to many, hence why we have an extensive client list spanning across all 32 counties of Ireland. However, while we supply to and support customers across the island – Offaly is the destination of our headquarters, meaning we are only a stone’s throw away if you need to access our services, whether it be for a detailed consultation or an urgent emergency. As we are nearby in Portarlington, we can easily cater to your project – large or small – and once the job is done, there is no upkeep or maintenance required for decades, making our services even more convenient for you.

We’re high quality

Our professional products and specialist services are what make us versatile. Depending on an initial consultation to determine your exact requirements, we can tailor our service to suit you. Whether that be just to purchase specific products, or contracting us to remodel and refit your roof, we can offer options from industry-leading brands, with materials supplied by CureIt, Crystic Roof, Dryseal and RES-TEC. With these products used alongside our practice, know you will be receiving only the best quality service, which in turn will bring long-term benefits to your roof.

We’re experienced

We’ve been delivering a broad range of roofing products and services for over 12 years, with satisfied clients stretching across all 32 counties of Ireland.

Our intricate knowledge of the CureIt, Crystic Roof, Dryseal and RES-TEC systems means we can give you a straight answer and not waste any time. We are approved contractors of each system and can also educate you on what fibreglass option is best dependent on your needs. Our extensive portfolio of past work puts us in an optimum position to find the perfect solution for your project.

Our testimonials

Our repeat client base speaks for itself. Often, our excellent standards of performance result in us catering to our customers on a recurring basis for other projects. Check out these reviews:

“We have worked with Liam at Nationwide for many years now and will continue to do so. Liam and his staff are great at what they do and are always available when needed.” – Arnon Construction

“Liam’s consistent attention to detail has provided my company with many years of satisfied clients and excellent work. He is a pleasure to work with and have recommended him to many of my clients and colleagues.” – McAuliffe Developments

“Nationwide Fibreglass have been working with Shomera now for many years on our garden rooms and extensions, they work to a very high standard and are extremely efficient.” – Shomera

“Liam is our main contractor when it comes to Crystic Roof, Dryseal and anything fibreglass, he has built a fine reputation for himself and his business over the years and we will continue to work with him in the future.” – All Time Cosy Homes

You can also read our other great reviews on our Facebook page.

These are the reasons we are Offaly’s leading fibreglass and flat roofing company. If you would like to get in touch with us, there’s plenty of ways to do so:

Find us at Nationwide Fibreglass, Rock, Portarlington, Co. Offaly, Ireland

Email us [email protected]

Call us on 0866055018

From cityscapes to the countryside: the best fibreglass for Dublin


Dublin is a diverse place. From its commercial cosmopolitan cityscape to its rural countryside hometowns. In Ireland, we have the luxury of choosing from the best of both worlds: our bustling concrete jungle and our quieter rustic escapisms. If you are a part of it, you will understand how much the distinct architectural structures define the capital’s individuality.

At Nationwide Fibreglass, we have served all corners of Dublin, as we can offer roofing solutions to suit the best of both worlds too. From commercial office buildings to cosy family homes, our products and expertise go beyond any other fibreglass provider and installer in Ireland. As we work closely with the products when both selling and utilising, we can guarantee you are getting top roofing service and solutions when you choose Nationwide Fibreglass.

Although we stock a wide range of top quality, established and innovative roofing systems that are all specially made to be waterproof, tough and enduring – we believe Dryseal is the best option to service the whole of Dublin.

What is Dryseal?

Dryseal is a unique component-based glass reinforced polyester (GRP) fibreglass roofing system. It comes with a 20-year insurance backed guarantee on materials and labour, with an expected lifespan of 30 years plus.  

What makes Dryseal different from other products is that unlike ‘wet lay’ systems, the Dryseal system is supplied pre-cured and ready to install. All Dryseal trims and membrane are manufactured under BS EN ISO 9001 and 14001 quality and environmental controls and are readily available for installation on site. Dryseal is a flexible system which can be easily fitted for ‘cold’ or ‘warm’ roof configurations, whether it be for Leisure Centres through to domestic extensions for example.

Therefore, not only is it a convenient, quicker option, its ability to be altered in accordance to the client’s needs and overall quality is also ranked highly by certifiers and customers across the industry.

Dryseal also boasts a range of versatile aesthetic features, including ease of detailing, resilient resistance to damage and extensive colour choices. Due to its flexibility depending on the needs of the roof – in this case, for both Dublin’s domestic and commercial installations – the Dryseal system has significantly increased in popularity all over the UK and Ireland.

Suitable for housing refurbishments

For homes that need a roofing revamp, Dryseal can easily be used in a re-roofing scenario. Providing the existing roof deck is in a suitable condition, it can also be covered with insulation to create a ‘warm roof’. The benefits are substantial, with reduced landfill costs if the existing roof covering is simply overlaid; reduced labour costs with less time required for the job; reduced long-term risk as Dryseal is guaranteed against leaks for 20 years and lower embodied CO2 than any comparable roofing system. As the colour of Dryseal’s polyester topcoat can be mixed to any BS or RAL colours, the customer’s ideal finish can by tailormade at Nationwide Fibreglass.

Ideal for commercial buildings

Dryseal has been successfully implemented across a range of commercial installation projects, including a private hospital in Sligo, Ireland. The original failed asphalt roof was overlaid with 100mm insulation and Dryseal. From the installation, the hospital has seen many benefits in return, with the major and most important advantage being huge savings in heating costs. Due to its durable features and 20-year lifespan guarantee, this system has become increasing popular across the commercial sector.

As we are approved contractors at Nationwide Fibreglass, our professional opinion recommends Dryseal as a trusted, robust roofing option to not just meet the needs of diverse Co. Dublin, but the entire island of Ireland. If you’re in the Dublin area and are keen to learn more about our fibreglass roofing solutions, call us for a free quotation on 0866055018.

Alternatively, you can email [email protected]

Or you can find us at Nationwide Fibreglass, Rock, Portarlington, Co. Offaly, Ireland

And don’t forget to check out our Facebook page.