Flat roofing systems in the UK (EPDM, GRP & felt)
Flat roofing systems such as EPDM rubber, GRP fibreglass, and modern felt provide durable, watertight solutions for UK homes and commercial properties.
What it is
Flat roofing covers low-pitch or flat roof structures using systems such as EPDM rubber, GRP fibreglass, or multi-layer felt membranes.
Best for
Well suited to a wide range of residential and commercial applications.
Home extensions and garages
Dormers and bay roofs
Apartment blocks and offices
Outbuildings and commercial premises
Key features / benefits
Flat roofing systems offer reliable protection and long-term performance.
Fully waterproof systems
Durable and weather-resistant
Low-maintenance when installed correctly
Suitable for foot traffic (depending on system)
Performs well in UK rain and cold conditions
Material composition
Common flat roofing materials used in the UK include:
• EPDM: Single-piece rubber membrane
• GRP: Fibreglass resin system with hard topcoat
• Felt: Multi-layer bitumen-based membranes
Estimated lifespan
Expected lifespan depends on the chosen system.
EPDM: 20–30+ years
GRP fibreglass: 25–40 years
High-performance felt: 15–25 years
Cost range
Flat roofing offers excellent value for money.
£60–£120 per m² installed
Price varies by system, access, and roof size
Maintenance needs
Minimal maintenance keeps flat roofs performing well.
Clear leaves and debris regularly
Check outlets and drainage
Inspect seams and edges periodically
Visual or texture style
Flat roofing prioritises function over appearance.
Clean, low-profile finish
Typically hidden from street view
Optional coatings for added protection
Warranty options
Warranty options vary by system and installer.
EPDM warranties typically 20–30 years
GRP systems often 20–25 years
Workmanship guarantees available
Installation time
Installation is usually quick and efficient.
Typically 1–3 days for residential roofs
Larger commercial roofs may take longer
Environmental impact / recyclability
Many flat roofing systems are environmentally conscious.
Long lifespan reduces waste
EPDM and GRP are low-maintenance systems
Energy-efficient performance
Fire or weather ratings
Designed to handle UK weather conditions.
Fire-rated systems available
Excellent resistance to rain and temperature changes
Available color or style options
Simple, functional colour options.
• Black and grey most common
• Optional coatings for added protection