2025 Price Guide

Flat Roof Costs UK

EPDM, GRP fibreglass, and felt roofing price guide

Quick Answer: Flat roof costs in the UK range from £40-80/m² for felt to £100-150/m² for GRP fibreglass in 2025. A typical garage flat roof (15m²) costs £800-1,500 for felt or £1,500-3,000 for EPDM/GRP. EPDM at £80-120/m² offers the best value with a 25-30 year lifespan.

Cost by Material Type

MaterialCost/m²15m² TotalLifespan
Felt (3-layer)£40-80£600-1,20010-15 years
EPDM Rubber£80-120£1,200-1,80025-30 years
GRP Fibreglass£100-150£1,500-2,25030-50 years

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