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There are many different flat roof systems available on the market today, each offering unique advantages depending on budget, building structure and usage. In this guide — Flat Roof Systems Compared — we examine the most commonly used flat roofing options and compare their materials, durability, installation requirements and long‑term performance.
We compare the following flat roof systems:
Concrete flat roofs are known for their exceptional strength and longevity. When properly designed, concrete roofs can withstand extreme weather conditions, including high winds and heavy loads.
Concrete roofs are typically sealed using asphalt or bituminous membranes, as concrete itself is not inherently waterproof.
Asphalt flat roofing is one of the most cost‑effective flat roof systems available and is often chosen for budget‑sensitive projects.
Asphalt roofing is best suited to simple, low‑risk flat roofs where affordability is the main priority.
Felt roofing is a traditional flat roofing method that involves torch‑on installation using multiple layers.
Felt roofing installations should always be carried out by qualified contractors with appropriate safety training and insurance.
EPDM (Ethylene Propylene Diene Monomer) is a single‑ply rubber membrane commonly used on residential flat roofs.
EPDM roofs should always be installed by experienced professionals to minimise long‑term issues.
Fibreglass roofing (GRP – Glass Reinforced Plastic) has become one of the most popular flat roofing systems for domestic and commercial projects.
Fibreglass / GRP roofing offers a tough, long‑lasting and low‑maintenance alternative to traditional flat roofing systems and is ideal for balconies, roof access areas and extensions.
|
Roofing System
|
Durability
|
Foot Traffic
|
Lifespan
|
Cost
|
|---|---|---|---|---|
|
Concrete
|
Very High
|
High
|
40+ years
|
High
|
|
Asphalt
|
Low-Medium
|
Low
|
~20 years
|
Low
|
|
Felt
|
Medium
|
Low
|
15-25 years
|
Medium
|
|
EPDM
|
Medium
|
Low
|
15-25 years
|
Medium
|
|
Fibreglass/GRP
|
Very High
|
High
|
20-40+ years
|
Medium
|
If you’re looking for a long‑lasting, seamless and highly durable flat roofing system, fibreglass / GRP roofing is an excellent choice. It is particularly well suited to:
TriRoof supplies a comprehensive range of fibreglass roofing kits and GRP supplies, including:
Choosing the right flat roof system is essential for long‑term performance and value. If you need help selecting the best roofing solution for your project, our technical team is here to help.
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.
Looking for a
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.