If you are thinking of replacing or installing a new flat roof on your home, chances are you have heard of EPDM rubber roofing and GRP fiberglass roofing. Professional roofers in the UK often recommend these two systems as they both offer excellent weather protection and years of reliable performance.
However, both systems have their own unique characteristics. So the right choice depends on your budget, the nature of your property and your preferences.
What is EPDM Roofing?
EPDM (Ethylene Propylene Diene Monomer) is a strong and durable synthetic rubber membrane that is particularly used for flat and low-slope roofs.
It is usually installed in large sheets, which reduces the number of joints and the chances of water leakage. This is why EPDM has become one of the most popular flat roofing systems in the UK over the past few years.
Key benefits of EPDM roofing
- Excellent resistance to rain, sun and harsh weather conditions
- Highly flexible, reducing the risk of cracking
- Low maintenance requirements
- Lifespan of 40 years or more
- Relatively low cost compared to many other flat roofing options
EPDM is considered an effective, economical solution especially for large flat roofs.
What is GRP Fiberglass Roofing?
GRP (Glass Reinforced Plastic), commonly known as fiberglass roofing is manufactured by combining fiberglass mats and special resins. This creates a strong, completely waterproof and smooth surface.
Unlike EPDM, GRP provides a hard and strong finish that is not only durable but also looks more modern and beautiful. That is why it is quite popular in home extensions, garages, balconies and modern residential projects.
Key Benefits of GRP Roofing
- Completely smooth and waterproof surface
- Strong and shock resistant
- Modern and attractive appearance
- Available in a variety of colors
- Suitable for areas with regular foot traffic
If you also value the aesthetics of your flat roof, GRP can be an excellent choice.
EPDM vs GRP Comparison
Lifespan and Durability
Both systems are designed to last a long time.
EPDM can typically last for 40 years or more, while a professionally installed GRP roof usually performs well for 25 to 40 years.
Appearance
If aesthetics are a priority, GRP is clearly the better choice. Its smooth and clean surface looks great with modern homes and extensions.
EPDM, on the other hand, is a more practical system. It is usually available in black and focuses more on performance than aesthetics.
Installation
EPDM is relatively quick and easy to install because larger sheets cover more area with fewer joints.
GRP requires more skill to install. It requires dry weather, proper preparation, and the layer-by-layer installation of fiberglass and resin.
Strength
Both systems are strong, but their strength characteristics differ.
EPDM’s flexibility allows it to adapt better to temperature changes and minor building movements.
GRP provides a stiffer and stronger surface, but can be more prone to cracking if there is a lot of movement in the roof structure.
Cost
In most cases, EPDM is the less expensive option.
GRP costs relatively more for both materials and installation, primarily due to its specialized installation process.
Which system is best for you?
If you’re looking for a durable, low-maintenance roofing system that offers excellent value for money, EPDM is often the ideal choice.
If you want a smart, modern finish and have a smaller flat roof, extension, or balcony where appearance matters, GRP fibreglass roofing may be the better investment.
There is no one-size-fits-all answer. The right solution depends on your property’s requirements, your budget, and how you expect the roof to perform over the years ahead.
At Dexters Build Ltd, we install and repair both EPDM and GRP roofing systems throughout Bedfordshire, Buckinghamshire, and Hertfordshire. We assess every roof individually and recommend the option that best suits the property rather than pushing a particular product.
Conclusion
Both EPDM and GRP are reliable flat roofing systems and provide excellent protection for many years after professional installation. No one system is better than the other in every situation.
The right choice is the one that suits your property, budget and long-term needs. That’s why it’s always beneficial to consult an experienced roofing professional so that you can be satisfied with your new flat roof for decades to come.
Frequently Asked Questions
Is EPDM roofing cheaper than GRP fiberglass roofing?
Yes, in most cases EPDM is the less expensive option as it is relatively easy to install and the materials are also less expensive.
Which roofing system lasts longer?
EPDM is generally considered to have a slightly longer lifespan and with proper maintenance can last for 40 years or more.
Can EPDM roofs be walked on?
Occasional walking is not an issue, but if the area is subject to regular traffic then GRP is considered a more suitable choice.
Which flat roof looks better in terms of appearance?
GRP fiberglass roofing generally provides a smoother, more modern and attractive finish, which is why it is quite popular for home extensions.
