GNP Roofing Building Ltd is one of the leading flat roof specialists Ealing homeowners call with more than 15 years’ experience in GRP fibreglass and EPDM rubber systems. We are fully insured and follow NFRC guidance. Every flat roof installation carries a written 10-year workmanship guarantee.
See our complete guide to roofing services in Ealing for the full range of flat and pitched roof work we carry out across West London.
Quick Answer
Flat roof specialists in Ealing from GNP Roofing install and repair GRP fibreglass and EPDM rubber flat roofs on extensions, garages and commercial units across W5, W7 and W13. A new flat roof typically costs £800 to £3,500 depending on size and system, small repairs start from £150, and every job comes with a written guarantee. Call 07424 323113 for a free quote.
Key Facts at a Glance
- GRP fibreglass and EPDM rubber systems, both fitted by our own trained team
- New flat roofs from £800–£3,500; repairs from £150
- Written 10-year workmanship guarantee on installations
- Same-day or next-morning quotes across W5, W7 and W13
- 15+ years fitting flat roofs on Ealing’s rear extensions and garages
GRP or EPDM: Which Flat Roof System Is Right for You
GRP fibreglass. A seamless, glass-reinforced plastic system bonded directly to the deck. It’s extremely durable, walkable, and well suited to roofs with awkward shapes, upstands or roof lights. Most GRP roofs last 25–30 years with minimal maintenance.
EPDM rubber. A single-ply synthetic rubber membrane, usually supplied in large sheets with very few joints. EPDM is more flexible than GRP, so it copes well with a building’s natural movement, and typically lasts 25–50 years.
As flat roof specialists in Ealing, we’ll recommend whichever system suits your roof’s shape, use and budget rather than pushing one system for every job.
Where Flat Roofs Are Used Across Ealing
Rear extension roofs. The most common flat roof job in Ealing, especially on W13’s post-war semis where single-storey kitchen extensions are standard.
Garage roofs. Older felt garage roofs are a frequent source of leaks; we replace them with GRP for a roof that needs almost no maintenance.
Dormer and bay roofs. Small flat sections on pitched roofs, often the first place a leak appears on a Victorian terrace.
Commercial and shopfront roofs. We also fit and repair larger EPDM membrane roofs on commercial units across West London.
Flat Roof Repairs in Ealing: Repair or Replace?
Flat roofs in Ealing are usually found on kitchen extensions, rear dormers, garages and bay windows. Many leaks on these roofs can be repaired. For example, we often fix splits, blisters, failed upstands and blocked outlets without replacing the whole roof.
However, replacement is often better value when the deck feels soft, leaks keep coming back or an older felt roof is near the end of its life. In that case, we explain the options in writing, including EPDM, GRP and torch-on felt. Our guide to EPDM vs GRP vs felt compares them in more detail. If water is already coming in, see our roof leak repairs in Ealing, or read more about our roofers in Ealing.
Signs You Need a Flat Roof Repair
Ponding water. Water that sits for more than 48 hours after rain usually means the roof’s fall is inadequate or has settled over time.
Bubbling or blistering. Trapped moisture beneath the membrane shows up as raised bubbles, and left alone these can crack and let water in.
Cracked or lifting edges. Trims, upstands and edge details are the most common failure point on both GRP and older felt roofs.
Visible felt roofs nearing the end of their life. Traditional felt lasts 10–15 years. If yours is older than that, replacing it with GRP or EPDM is usually more cost-effective than another felt repair.
Flat Roof Specialists Across Ealing’s Postcodes
W5 (Ealing Broadway & South Ealing): Flat roofs here are mostly on rear additions to Victorian and Edwardian terraces. We fit GRP upstands carefully around original brickwork and window openings.
W7 (Hanwell & Boston Manor): Garage and side-return flat roofs on interwar semis. The canal-side humidity in this area makes a fully sealed GRP or EPDM system especially worthwhile.
W13 (West Ealing & Drayton Green): The highest concentration of flat-roof rear extensions in Ealing, on 1950s–1970s homes. We often replace these at the same time as pitched roof work — see our new roof installation in Ealing guide for pitched roof costs and materials.
What a Flat Roof Installation Involves
- Free survey and quote. We check the existing deck, falls and any rot before quoting, so the price is accurate.
- Deck preparation. Any damaged timber decking is replaced before the new system goes down.
- Insulation, if needed. We can upgrade insulation to current Building Regulations standards during the same visit.
- System application. GRP is laminated in place and cured; EPDM is bonded and dressed into upstands and outlets.
- Final check and guarantee. We check falls and outlets are clear before issuing your written 10-year guarantee.
Frequently Asked Questions: Flat Roof Specialists in Ealing
How much does a new flat roof cost in Ealing?
A typical garage or small extension roof costs £800–£3,500 depending on size, system and access. We always confirm the exact price in writing after a free survey.
How long does a flat roof last?
GRP typically lasts 25–30 years and EPDM 25–50 years, compared with 10–15 years for traditional felt.
Can you repair my flat roof instead of replacing it?
Often, yes. If the damage is localised, a repair from £150 may be all that’s needed. We’ll give you an honest recommendation rather than push a full replacement.
Do you fit flat roofs on commercial buildings?
Yes, we fit and repair EPDM membrane roofs on commercial and shopfront units across West London as well as residential extensions.
What areas around Ealing do you cover for flat roofing?
Alongside Ealing itself (W5, W7, W13), we cover Southall, Hanwell, Greenford, Acton, Hayes, Hounslow, Northolt, Brentford, Wembley, Harrow, Hillingdon, Uxbridge and Slough.
Get a Free Quote From Ealing’s Flat Roof Specialists
Whether you need a leaking garage roof replaced or a full GRP installation on a new extension, GNP Roofing Building Ltd brings 15+ years of flat roofing experience to every job in Ealing.
Call 07424 323113 now, or request your free quote online and we’ll get back to you as quickly as possible.
GNP Roofing Building Ltd · 94 Scotts Road, Southall, England, UB2 5DE · info@gnproofingltduk.co.uk