Flat roofs on extensions, garages, dormers and outbuildings need specialist attention. We install GRP fibreglass, EPDM rubber membrane and high-performance built-up felt systems — each specified to su Serving Greenford and all surrounding areas in Ealing.
Flat roofs on extensions, garages, dormers and outbuildings need specialist attention. We install GRP fibreglass, EPDM rubber membrane and high-performance built-up felt systems — each specified to suit the size, use and exposure of your flat roof. Every installation includes proper falls, drainage and upstand detailing.
The most common flat roof failure in Greenford is inadequate drainage. Original felt roofs from the 1960s-80s were often laid with insufficient fall — water pools, UV breaks down the membrane, and leaks follow. We install minimum 1:40 falls on every job using tapered insulation boards.
Before any new flat roof goes on in Greenford, we strip back to the deck and inspect the timber. In Greenford properties, we commonly find rotten plywood caused by years of ponding from inadequate falls. Catching this before the new membrane goes down saves a callback later.
GRP fibreglass gives a seamless, rigid surface that handles foot traffic — ideal for balconies and walkable roofs. EPDM rubber is flexible, handles movement well, and comes in single sheets that eliminate seam failures. For most Greenford extensions under 20m², GRP is our recommendation.
Predominantly 1930s-50s semi-detached houses along Greenford Road and Oldfield Lane. Post-war Perivale estates to the east. Some 1960s tower blocks near Greenford Broadway station. For flat roofing work in Greenford, this housing profile means we commonly encounter Concrete interlocking tile nail sickness across 1950s estates — original nails corroding simultaneously across whole streets. Flat roof ponding on 1960s blocks near the station. Lead valley failures o
The streets of Greenford — including Greenford Road, Oldfield Lane, Ruislip Road — have roofing characteristics that reflect their construction era and the specific exposure conditions of Ealing. Ealing sits on relatively flat ground west of central London, exposed to prevailing south-westerly weather systems that track up the Thames corridor. The heavy tree canopy across Ealing Common, Walpol
Flat Roofing in Greenford: £800–£6,000 depending on scope, access and materials. Free, written, no-obligation quotes. Call 0203 302 2547.
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A typical single-storey rear extension flat roof in Greenford costs £1,200–£3,000 depending on size and system. Garage roofs run £800–£2,000. Larger commercial or multi-section flat roofs can be £4,000–£6,000+.
GRP fibreglass lasts 30-40 years with minimal maintenance. EPDM rubber membrane lasts 25-30 years. Traditional felt typically lasts 10-15 years. We recommend GRP or EPDM for any flat roof in Greenford — the upfront cost is recovered many times over in lifespan.
Yes — GRP fibreglass is seamless, UV-stable, impact-resistant and lasts 2-3 times longer than felt. The only advantage felt has is lower upfront cost, which is a false economy over 20+ years.
If the membrane is sound but a localised area has failed, we can patch repair. If the membrane is blistered, cracked or ponding across more than 20% of its area, full replacement is more cost-effective.
Under current Building Regulations, any flat roof replacement must include insulation to meet thermal performance standards. We install rigid insulation boards above the deck, which also creates the correct drainage falls.
The three most common causes in Greenford are: ponding water from inadequate falls, membrane failure at upstands and abutments, and blocked outlets. All three are preventable with correct specification and installation.
A typical extension flat roof takes 1-2 days. Larger projects or those requiring significant deck repairs take 2-4 days. Weather-dependent — GRP cannot be laid in rain.
Ealing's roofing heritage reflects its growth as a Victorian and Edwardian suburb. The earliest surviving roofs on properties around Haven Green and Ealing Broadway date from the 1880s — handmade clay peg tiles on steep pitches with decorative ridge tiles that are now almost impossible to source new. The 1930s building boom brought concrete interlocking tiles to the newer estates across Pitshanger, Northfields and South Ealing, and these roofs are now 85-90 years old and approaching the end of their design life.
Ealing's tree-lined streets create specific seasonal roofing challenges. Autumn brings heavy leaf fall from the mature London planes, limes and oaks that shade residential streets — blocked gutters, valley obstructions and moss-promoting debris accumulation are the predictable result. Winter frost affects the older clay tile stock more severely than modern concrete — water trapped in micro-cracks expands and spalls tile surfaces, a process that accelerates once the protective patina is lost.
A well-maintained roof in Ealing directly affects property value. With average house prices in W5 exceeding £700,000, a deteriorating roof can reduce sale value by £15,000-25,000 — far more than the cost of timely repair or replacement. Buyers and surveyors in Ealing are experienced enough to spot deferred roof maintenance, and mortgage lenders will flag roof condition on valuation reports.
Flat roof installation follows a strict sequence that cannot be shortcut. Stage one: strip the existing covering and inspect the deck. Stage two: repair or replace any damaged deck timbers — rotten OSB or plywood is the most common finding on existing flat roofs. Stage three: install tapered insulation boards to create the correct drainage falls (minimum 1:40 gradient). Stage four: apply the chosen membrane system — GRP fibreglass with resin lamination, or EPDM rubber with bonded seams. Stage five: detail all upstands, drip edges and abutments. Stage six: inspect, photograph and hand over.
GRP fibreglass creates a seamless, rigid surface that handles foot traffic and resists impact — ideal for balconies, walkable roofs and areas where you need to access equipment. EPDM rubber is flexible, accommodates structural movement, and comes in single sheets up to 15m wide that eliminate seam failures. Both systems carry 25-40 year lifespans when correctly installed. We do not install traditional felt systems for new work — the lifespan is too short to justify the labour cost of installation.
All flat roof installations carry our 10-year workmanship guarantee. GRP systems additionally carry a 25-year manufacturer guarantee on the membrane when installed by an approved contractor — which we are. EPDM carries a 20-year manufacturer guarantee on the membrane. These guarantees are meaningful because both products have track records exceeding their guarantee periods.
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