Flat roofs on extensions, garages, and outbuildings need the right system installed correctly to avoid the leaks that give them a bad reputation. We install EPDM rubber, GRP fibreglass, and felt flat roofing systems across North Walsham and North Norfolk. All our flat roofs come with a long-term guarantee.
Image: North Walsham flat roofing
Flat roofing is needed on single-storey extensions, garage roofs, bay window tops, and outbuildings — property types that are very common across North Walsham and the surrounding villages. A poorly installed flat roof will leak within a few years. A correctly installed modern system should last 20–25 years without major intervention.
We install three main types of flat roofing system. EPDM rubber membrane is a single-ply system that is glued in large sheets with very few joins, making it highly resistant to leaks. GRP fibreglass roofing is laid as a continuous moulded surface that is particularly durable and handles foot traffic well. High-performance torch-on felt is a lower-cost option that still outperforms traditional mineral felt by a significant margin. We'll talk through the pros and cons of each system for your specific situation — bay roofs, for example, benefit from EPDM due to the awkward angles, while flat garage roofs in exposed locations often suit GRP.
Flat roofs installed without proper falls — the slight slope that drains water off the surface — will pond water and fail early. We cut all new decking to create the correct drainage falls before applying any membrane. We also fit proper drip trims, outlets, and upstands where the roof meets a wall or parapet. These details are often where cheap flat roof jobs fail.
We survey the existing structure before quoting, replacing any rotten decking boards as part of the job. Most garage or small extension flat roofs in North Walsham can be completed in one to two days. We provide a written guarantee of 20 years on EPDM and GRP systems.
Flat roof installation in North Walsham typically costs between £70 and £120 per square metre, depending on the system chosen and the condition of the existing deck.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge — we aim to be on-site within 24 hours.
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