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Fibreglass roofing, also known as GRP roofing, is one of the most durable and cost‑effective flat roofing solutions available in Ireland today. Whether you’re a contractor, builder or DIY installer, understanding GRP roofing systems and choosing the right fibreglass roofing supplies is essential for long‑term performance.
In this guide, we explain what GRP is, why it’s ideal for flat roofs, and how to correctly install a fibreglass roof using professional fibreglass roofing kits.
Glass Reinforced Plastic (GRP) — commonly referred to as fibreglass — is a strong, lightweight material made by combining thermosetting resins with glass fibres. Once bonded, these materials form a highly durable, waterproof composite that performs exceptionally well in roofing applications.
GRP is:
These properties make fibreglass roofing ideal for both residential and commercial flat roofs.
GRP has been used in the UK and Ireland since the 1940s, originally within the marine industry for boat building. As its durability, versatility and clean finish became more widely recognised, GRP was adopted across multiple sectors, including:
Today, GRP roofing systems are one of the most popular flat roofing solutions across Ireland due to their long lifespan and minimal maintenance requirements.
A GRP roofing system is a seamless, single‑ply membrane applied directly to OSB3 decking boards. When installed correctly using high‑quality fibreglass roofing supplies, a GRP roof can last 20+ years.
Once cured, fibreglass is inert — meaning it won’t rot or corrode, even in harsh Irish weather conditions.
A standard GRP roofing installation requires:
Using complete fibreglass roofing kits ensures compatibility between materials and helps achieve a professional, long‑lasting finish. For best results, always source your fibreglass supplies in Ireland from reputable suppliers who offer technical support.
Before starting your GRP roofing installation, keep the following in mind:
Correct conditions are essential for a successful fibreglass roofing installation.
Proper deck preparation is critical to the performance of any GRP roofing system.
Staggered joints help create a strong, bonded deck once laminated.
GRP edge trims provide a neat, watertight finish and are an essential part of any fibreglass roofing system.
Before applying resin:
Trim any uneven edges before laminating.
Apply resin to joints and corners first, followed by the main roof area. Use a paddle roller to remove air pockets — the fibreglass should appear transparent once fully saturated.
Topcoating is the final stage of the fibreglass roofing process.
For best results, topcoat within 24 hours of lamination.
Choosing high‑quality fibreglass roofing supplies in Ireland is just as important as correct installation. Reliable materials, complete GRP roofing kits and technical support ensure your roof performs for decades.
Our experienced technical team is on hand to help with product selection, installation guidance and troubleshooting.
When selecting a flat roofing system, understanding the differences between fibreglass (GRP) and EPDM rubber is crucial. This guide compares their durability, installation processes, maintenance requirements, and overall performance to help you make an informed decision. Whether you’re a homeowner
Explore the key differences between popular flat roofing options including Concrete, Asphalt, Felt, EPDM, and Fibreglass/GRP. Learn about the materials, application methods, and benefits of each system to help you choose the best solution for your project.
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GRP, or Glass Reinforced Plastic, is a strong, lightweight material known for its durability and resistance to corrosion—ideal for roofing systems. This guide explores the benefits of GRP, its common uses, and how to correctly install a long-lasting fibreglass roof
Tricel and ECMS restored a WWII-era commercial flat roof at IWM Duxford using TriRoof HPX System, delivered ahead of schedule with a 20-year guarantee.