Flat Roof Guide (UK)
Types, Costs & Lifespan Explained
Flat roofs are commonly used for extensions, garages, and modern properties.
Hereβs what you need to know.
Types of Flat Roofing Systems
Flat Roof Types (UK Guide)
Felt, Fibreglass & Rubber Flat Roofs Explained
Below is a breakdown of the three main types of flat roof materials used in UK roofing.
Felt Roofing (Torch-On Felt Systems)
Felt Roofing (Torch-On Felt Systems)
Description
Felt roofing is one of the most traditional flat roofing systems in the UK. Modern systems use layers of bitumen-based felt, typically applied using a torch-on method to create a sealed, waterproof surface.
Best Use
Garages
Extensions
Sheds and outbuildings
Cost-conscious roofing projects
Advantages
Most affordable flat roofing option
Reliable when installed correctly
Easy to repair
Suitable for a wide range of roof sizes
Considerations
Shorter lifespan than newer materials
Can be prone to wear over time
Seams may weaken if not properly maintained
Typical Lifespan
π Around 15-25 years depending on quality and maintenance
GRP Fibreglass Roofing
GRP Fibreglass Roofing
Description
GRP (Glass Reinforced Plastic), commonly known as fibreglass roofing, is a liquid-applied system that cures to form a seamless, hard-wearing surface.
Best Use
Extensions
Modern residential properties
Flat roofs where a clean, seamless finish is preferred
Advantages
Seamless finish (reduces risk of leaks)
Durable and impact-resistant
Low maintenance
Clean, modern appearance
Considerations
Higher upfront cost than felt
Requires dry conditions during installation
Must be installed by experienced professionals
Typical Lifespan
π Around 20β30 years
EPDM Rubber Roofing
Description
EPDM is a synthetic rubber membrane, supplied in large sheets and bonded to the roof surface. It is known for its flexibility and weather resistance.
Best Use
Large flat roofs
Extensions and garages
Roofs requiring long-term durability
Advantages
Durable and weather-resistant
Flexible material (handles temperature changes well)
Minimal joints, reducing leak risk
Low maintenance
Considerations
Higher cost than felt
Appearance is more functional than decorative
Requires proper installation for best performance
The most delicate of the options - no footfall or ladders as it is easily damaged.
Typical Lifespan
π Around 20β30+ years
Benefits
Which Flat Roof Material Is Best?
The right choice depends on:
Your budget
Roof size and structure
Desired lifespan
Appearance preferences
Things to consider:
Things to consider:
π Felt is ideal for affordability
π GRP offers a modern, seamless finish
π EPDM provides long-term durability
Need Advice or a Quote?
At JMB Roofing Ltd, we install and repair flat roofs across Bedford, Northampton, and surrounding areas.
π Call 07946 408708
π§ [email protected]
π Get in touch today for expert advice and a FREE quote
TESTIMONIALS
What Client Our Says About Us
Great roofer with excellent customer care!
jason did a fantastic job replacing a leaking flat roof, replacing broken tiles and lead flashings. As it was quite windy and wet on the first night, Jason drove out just to make sure our roof lights were secure and everything was battened down properly. Second day , the job was completed to an excellent standard and all working around a wet and windy couple of days to make sure we were leak free. Its rare to come across such professional tradesmen that genuinely cares for his customers. I wouldn't hesitate to recommend him. Thanks for your great care and professionalism.
Richard O'Brien
100% Recommend, very professional and well priced.
Jay and his son completed a brand new flat roof, really lovely job and were a lot cheaper than the other top rated roofers.
Katie Grace
Total flat roof replacement including boards and full house guttering replacement.
We had a fantastic experience with JMB! From start to finish we were thoroughly impressed. Jason and co worked incredibly hard on our complete flat roof replacement and new guttering, and the quality of their work is outstanding. We were so grateful for their professionalism they were always polite , tidy, and clearly experts, guiding us with their knowledge whenever we had questions. Its clear he runs a wonderful family business built on fair prices and honest work. We would while heartedly recommend JMB to anyone. Thank you so much for everything!!
Callie Prentice
