Specialist flat roofing for extensions, garages, outbuildings and commercial properties across Farnham and Surrey. GRP fibreglass, EPDM rubber and felt systems — all installed to manufacturer specification with long-term guarantees.
Flat roofing in Farnham costs £800–£6,000 depending on material and area. GRP fibreglass is our standard recommendation — seamless, 25-year lifespan, maintenance-free. We specify correct drainage falls on every job, as ponding is the main cause of flat roof failure. Free written quotes.
We install three main flat roofing systems. Each has different performance, cost and longevity characteristics. We'll recommend the right one for your project.
The premium flat roofing solution. GRP (glass reinforced plastic) creates a seamless, fully waterproof surface with no joins or seams — so no weak points. Extremely durable and virtually maintenance-free.
Single-ply EPDM (ethylene propylene diene monomer) rubber roofing. Flexible, highly weather-resistant and cost-effective. An excellent long-term solution for most residential flat roof applications.
Modern torch-on felt systems use high-performance polymer-modified bitumen sheets. A proven, cost-effective solution for garages and outbuildings where budget is the primary consideration.
We install flat roofing systems across all types of residential and light commercial properties in Farnham and the surrounding area.
GRP fibreglass is ideal for single-storey rear and side extensions. Seamless finish, excellent drainage and decades of trouble-free performance.
The most common flat roof call we receive. We replace aged felt garage roofs with modern GRP or EPDM systems that will outlast the building.
Garden rooms, home offices, studios and sheds. We specify the right system based on size, use and budget.
Small commercial properties and retail units across Farnham and the surrounding Surrey area. We work out of hours where required.
Flat-roofed dormers on loft conversions are a common leak source. We replace and waterproof dormer roofs to stop persistent ingress.
GRP fibreglass is the preferred system for walkable flat roofs and roof terraces — safe underfoot, slip resistant and fully waterproof.
Costs depend on roof size, system chosen and access requirements. These are typical ranges for common flat roof projects in the Farnham area.
| Job Type | System | Typical Cost |
|---|---|---|
| Single garage flat roof | GRP Fibreglass | £900 – £1,800 |
| Single garage flat roof | EPDM Rubber | £700 – £1,400 |
| Double garage flat roof | GRP Fibreglass | £1,500 – £3,000 |
| Extension flat roof (up to 20m²) | GRP Fibreglass | £1,800 – £3,500 |
| Extension flat roof (20–40m²) | GRP Fibreglass | £3,000 – £5,500 |
| Felt garage roof replacement | Torch-on Felt | £600 – £1,200 |
* All prices include stripping existing surface, new decking if required, system installation and all edging details. Call for a free site visit and exact quote.
"Had our garage roof done in GRP fibreglass after years of patching a leaking felt roof. The difference is night and day. Professional installation and absolutely no issues since."
"They replaced the flat roof on our rear extension with fibreglass. Absolutely no disruption, the finish is immaculate and it looks far better than the old felt. Highly recommend."
"Used them to replace an EPDM roof on our garden room. They explained all the options clearly, the price was fair, and the job was done in a day. Five stars."
A properly installed GRP fibreglass roof has a lifespan of 25–40 years. It comes with a 20-year manufacturer-backed guarantee when installed by a certified installer. It is widely considered the most durable flat roofing system available for residential properties.
A single garage flat roof in GRP fibreglass typically costs £900–£1,800. Extension flat roofs range from £1,800–£5,500 depending on size and system. We provide free, itemised no-obligation quotes for all flat roofing work.
GRP fibreglass is our recommendation for most residential extensions. It's seamless so there are no joins to fail, extremely durable, and virtually maintenance-free. EPDM rubber is an excellent and slightly more cost-effective alternative with similar longevity.
Yes — if the existing roof structure is sound and damage is isolated, repair can be very cost-effective. We'll inspect the roof honestly and tell you whether repair or replacement is the better long-term investment. We won't recommend replacement if a repair will solve the problem.
We'll visit your property, assess the job, recommend the right system and give you a fully itemised quote — all completely free.
0125 244 7622Mon–Fri 8am–6pm · Sat 8am–2pm · Emergency 24/7