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GRP fibreglass roofing

We at B A Boyle & Son LTD are a specialist GRP Fibreglass roofing contractors based in Suffolk, with GRP roofers trained and certified to repair and install a number of GRP roofing solutions, including Topseal, Green Roofing and Roofproof.

Trained & Certified Fibreglass Roofing Contractors

Robust, long-lasting, and versatile, GRP Roofing (also known as fibreglass roofing) has become the UK’s solution of choice for flat roofs and structures of all varieties since its introduction in the 1940s.

Providing an equally practical, and aesthetically pleasing option for roofing across a wide variety of surfaces and building types, GPR systems such as Topseal and Roofproof offer the unique advantages of imperviousness, seamlessness, and flexible moulding – allowing for the creation of highly effective solutions in even the most complex spaces.

Boasting an expected lifespan of up to 100 years, and warranties of up to 45, this low-maintenance option is ideal for new-builds and period properties alike.

Fibreglass Roofing Installation

B.A. Boyle & Son’s hand-selected team of professional roofers are trained and certified across a number of GRP roofing solutions, including Topseal, and Roofproof. Our installation service is offered on a bespoke basis – meaning we will work with you to establish the best system and design for your project’s precise requirements. Contact us to further discuss our fibreglass roof installation service.

Fibreglass Roofing Repair

Fibreglass roofs, when installed correctly, are extremely long-lasting and hardwearing, with guarantees of up to 45 years. Despite the natural robustness of GRP, incorrect installation can result in issues such as cracking and pinholes.

We offer a comprehensive fibreglass roof repair service, covering all common issues. For an individual consultation regarding this service, contact us.

Why Select GRP Fiberglass Roofing?

  • Seamless Finish – Offering a stylish solution to welded and glued alternatives, GRP fibreglass’ seamless finish ensures minimal weakness. Its visually appealing, smooth surface cannot be broken through regular use.
  • Maintenance-Free – GPR roofing creates a long-lasting, impervious membrane across all applications, meaning, when applied correctly, they require no maintenance unless significantly damaged, or in need of cleaning.
  • Long-Lasting – With Topseal warranties offered for up to 45 years, and most roofs using GRP expected to last for up to a century, this material is an excellent option for those seeking a long-lasting, low-maintenance solution.
  • Versatile – GRP’s ability to mould to even the most complex shapes allows for the creation of roofs in line with all existing roof and property structures. Its versatile and hardwearing nature allows for its further application on spaces such as balconies.
  • UV Resistant – Fibreglass roofs are extremely resistant to UV damage, allowing them to remain structurally sound over extended periods of time, even in spaces subject to continued exposure.
  • Insulating – In addition to being sustainable, both ‘regular’ fibreglass and green roofs offer the property below a significant level of insulation and protection, reducing electricity bills throughout the year.

GRP Roofing Solutions

B.A. Boyle & Son are proud to offer a number of GRP system options under our fibreglass roofing service, allowing our clients to make the right choice for their project’s individual needs across both installation and repair. Read more on our three primary options below:


Topseal fibreglass roofs combine innovative technology with high-quality workmanship. Composed of a specially formulated roofing resin, topcoat, and GRP edge trims, Topseal provides a seamless, safe, and long-wearing finish across almost any surface in a wide variety of colour finishes.

Designed and implemented in a bespoke manner, with a 45-year guarantee on both materials and workmanship, this award-winning roofing is a low-maintenance, high-quality choice.

  • 45-year guarantee
  • Sustainable by design
  • Heatless installation
  • UV-resistant
  • Waterproof
  • Available in many colours


A cost-effective solution for both flat-roofing installation and repairs, German-designed Roofproof GRP produces a highly adaptable, fibre-reinforced, and fully-waterproofed finish, boasting excellent adhesion across a number of building materials.

Offered by B.A. Boyle & Son’s accredited roofing professionals, Roofproof fibreglass roofs are offered with a 20-year guarantee.

  • 20-year guarantee
  • Highly cost-effective
  • Waterproof
  • UV-resistant
  • Fast application
  • Adaptable adhesion

Green Roofing

A recent addition to B. A Boyle & Son’s GRP roofing range, Topseal’s GreenTop green roof solution offers a long-lasting, sustainable, and visually appealing addition to any flat roof space. Taking advantage of Topseal’s long-lasting, fully-waterproof nature, GreenTop allows for the creation of a bespoke natural space, from simple turf to wildflower gardens – adding sound insulation, and protecting the property below from temperature fluctuation.

  • 25-year guarantee
  • Waterproof
  • Sustainable
  • Adds sound insulation and protection
  • Delivers significant energy savings
  • Unique, aesthetically pleasing solution

Roofing Contractors

We Take Our GRP Roofing Seriously

Delivering Excellence And Building Client Relationships.

The award-winning B A Boyle & Son LTD based in Ipswich, Suffolk, is a family-run fibreglass roofing company with fully licensed, accredited and insured roofers with over 45 years of experience offering a bespoke GRP roofing service.

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Please contact us today

for your free consultation

A member of our friendly team of GRP roofers will be more than happy to assist you.

Fibreglass Roofing FAQ’s

What is GRP?

GRP stands for ‘Glass Reinforced Plastic’, a modern roofing material composed of polyester resin, and reinforced by chopped strand mat glass fibres. GRP Is commonly used in roofing and construction due to its strength as a composite, and its lightweight. Though it has been in use since the 1940s, GRP has been further developed to function as a durable, lightweight, flexible, fully reinforced, and waterproof material capable of being moulded to any shape.

Today, GRP is most commonly used in the creation of flat roofs, offering an easily repairable, flexible, fast-drying, fully waterproof roofing surface.

How Much Does a Fibreglass Roof Cost?

The cost of a fibreglass or GRP roof is highly dependent on a number of factors - primarily whether the structure is being built from scratch, or is simply an existing roof system in need of alteration or repair. In addition to this, those looking to purchase a fibreglass roof should consider the square footage of the roof, the complexity of the project, the system used, and, of course, the professionals hired to complete construction.

It is important to ensure that the professional selected to install a fibreglass roof is accredited and skilled, as, although GRP materials are hard-wearing, flat roofs created using this material incorrectly can fast require significant repairs.

Although fibreglass flat roofs are generally slightly more expensive than EPDM or rubber roofing systems, they offer an increased value for money in their longevity, weather resistance, and low-maintenance nature.

To further discuss your fibreglass roof project requirements and costs, contact B.A. Boyle’s team of professional roofers today.

What's the best flat roof system?

There are a number of flat roofing systems on the market, with the most well-known generally being EPDM, rubber, PVC, and GRP/fibreglass. For many across the UK, including our roofing team, GRP is the ideal choice, offering an unrivalled level of value for money. GRP roofs, when correctly installed by skilled professionals, offer a superior level of robustness and versatility, offering none of the weak points seen in its welded and glued competitors. In addition to this, GRP is generally considered to be very aesthetically pleasing, with renowned brands such as Topseal offering thousands of colour combinations to match a wide variety of applications, from new-build balconies, to period property roofs.

Can GRP roofs crack?

When correctly installed by a professional team, GRP roofs very rarely experience cracking, and, in fact, should be subject to little-to-no maintenance in their decades-long lifespans. Where cracking does occur, it may be a result of age, excessive expansion and contraction as a result of exposure to heat on hot days, or incorrect initial installation, where, for example, too little top-coat was applied. A crack in a GRP roof can generally be repaired by a trained professional, with methods used varying according to the severity of the damage.

For further information regarding GRP roof repairs, please contact B.A. Boyle & Son.

Can I walk on a Fibreglass roof?

Fibreglass roofs can generally be walked on, making them extremely versatile, and suitable for use on both domestic and commercial properties. With GRP generally being suitable for this application, it may also be used on surfaces such as balconies. The amount of material and number of layers applied generally corresponds to the amount of foot traffic expected for a specific area.

To further discuss your exact requirements for your fibreglass roof design and installation, contact the B.A. Boyle & Son roofing team for a no-obligation consultation.

What are the benefits of having a green roof?

Green roofs are both an aesthetically pleasing, and functional addition to any flat-roofed property. Offering the traditional benefits of a fibreglass roof alongside a number of unique upsides added by the presence of vegetation, green roofs provide shade, insulation, and protection to the properties upon which they are situated.

Taking advantage of Topseal’s long-lasting, fully-waterproof nature, GreenTop allows for the creation of a bespoke natural space, from simple turf to wildflower gardens - adding sound insulation, and protecting the property below from temperature fluctuation.

To further discuss your plans for a green roof, contact B.A. Boyle’s GRP certified roofing team for a no-obligation consultation.

Do green roofs really work?

Green roofs do really work. Whether taking the form of simple turf, or a wildflower garden, these unique additions to flat rooftops offer a number of ‘working’ benefits to the properties upon which they are situated. One of the primary ways in which a green roof ‘works’ is its reduction in the roof’s exposure to the elements, helping ensure that the GRP membrane beneath the vegetation lasts for an extended period of time. In addition to this, green roofs offer further protection from the elements in the form of insulation and fire retardation, helping reduce the amount of energy required to heat the property below and to further ensure the safety of its residents.

Can GRP roofs be repaired?

GRP roofs, in theory, should not need to be repaired within their allocated lifespan - which for many brands, is up to 50 years. When prepared and installed correctly, GRP roofs should be completely resistant to corrosion, rot, and general degradation - however, if installed incorrectly, issues such as pinholes and cracking may occur. These issues pose concerts surrounding watertightness and further damage, meaning they should be dealt with quickly.

Luckily, GRP roofs, in most circumstances, can be repaired. This job should be undertaken by an accredited professional, who will alter their method to fit the issue present. Emergency repairs should be undertaken where water is visibly leaking, or during heavy rainfall.

How long will a GRP roof last?

Cured fibreglass or GRP does not rot or corrode, meaning that when installed correctly, the guaranteed lifespan of a roof of this type can be anywhere from 20 to 45 years depending on the system or brand selected. Outside of this guarantee, some brands, such as topseal, are thought to have an expected lifespan of up to a century.

In order to ensure your GRP roof lives up to its potential in terms of longevity, it is vital to ensure that it is prepared and installed correctly. The best way to do this is to bring on board an accredited professional, with experience in installing GRP/fibreglass roofs.

Is Fibreglass roof better than felt?

Fibreglass is a significantly more durable and versatile roofing material than felt and is particularly suited to the flat-roof application. Within this context, the nature of the material makes it vastly superior to felt. Whereas alternative materials possess weak-points in the form of glued joints and welds, or even in their composition, fibreglass is a seamlessly applied, fully waterproof, and highly resistant surface when installed correctly, allowing it to outlast its competitors, often by decades.

To further discuss the benefits of fibreglass roofs, alongside their suitability for your project, contact the B.A. Boyle & Son roofing team for a no-obligation consultation.

What’s the difference between GRP and fibreglass?

Like many terms in the trade, GRP and fibreglass are just two different ways of saying the same thing. ‘Glass fibre’ is another term. They are all terms given to glass-reinforced plastic (GRP) fibres used across a range of industries and applications for their excellent thermal and acoustic insulating properties.

GRP is a composite material made from tiny fibres of glass that are embedded in a resin (plastic). It combines the properties of both to produce a very strong, lightweight, and corrosion-resistant material that see use in construction, thermal and acoustic insulation and manufacturing. Importantly, it is cheaper than other, similar composites, such as FRPs (fibre reinforced plastics) and carbon-fibre composites.

How do I clean a fibreglass roof?

There are typically 2 steps to cleaning a fibreglass roof. These are the actual cleaning of the roof, and then after cleaning the roof, you can coat it. This will refinish the roof and ensure that the inside of it remains moisture-free. Beyond this, fibreglass roofs are comparatively low maintenance.

To clean a fibreglass roof, first ensure that it is safe, and easy to access. Next, lightly sweep away any loose dirt or debris (such as leaves and twigs) with a long brush. Finally, using a mop and bucket containing warm, soapy water, carefully mop the roof. The remaining suds can be washed away with clean water, or even a garden hose.

It’s important to ensure that water doesn’t pool when you are putting a lot of water on the roof. Where possible, avoid using a pressure washer, but if you do, ensure that it isn’t a hot one, or one that uses hot steam, as this can compromise the structural integrity of the roof short term and long term.

Once the roof has dried, you can coat the roof if you think the roof needs it. A common sign that the roof needs re-coating is that water pools on its surface. This can be done with gel coat or acrylic coat roof paint. Gel coat is often easier to apply, though acrylic typically lasts longer.

It may be beneficial to sand the existing finish before applying a coat on a new roof. If it’s not new, it may require sanding, cleaning, striping and disinfecting, and cracks or holes will need filing in.

The above is a rough guide for cleaning and coating your fibreglass roof. For optimum results, contact B. A. Boyle & Son for a free consultation.

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