GRP fibreglass and EPDM rubber flat roofing for extensions, garages and bungalows. Installed with proper drainage falls and edge detailing. Covering Northallerton, Bedale, Thirsk, Romanby and the surrounding area.
GRP fibreglass and EPDM rubber flat roofing for extensions, garages and bungalows. Installed with proper drainage falls and edge detailing. Flat roofing from £800. Free surveys, 25-year system guarantees.
Seamless one-piece system applied over 18mm WBP ply deck. 25-year lifespan, no joints to fail, any colour topcoat available.
Single-ply rubber membrane for larger areas. 30–50 year lifespan, superior thermal flexibility, ideal for bungalow roof sections.
Full strip of existing felt, new ply deck where required, new membrane system. Priced per m² with no hidden extras.
18mm WBP plywood deck installation over existing joists. Correctly graded falls built in to prevent water ponding.
Correct outlet positioning and sizing as part of every installation. Undersized drainage is the leading cause of early flat roof failure.
Rigid insulation board installation below the membrane where thermal performance needs improving — common on older bungalow stock.
Northallerton's housing stock is predominantly Victorian and Edwardian town centre properties with Welsh slate or clay plain tile; 1930s semis on residential streets; modern estates on the fringe. Understanding the specific roof types and their failure modes is what separates a knowledgeable local roofer from a national firm that sends whoever's nearest.
Vale of Mowbray location with open exposure from north and east; higher wind exposure than towns sheltered by the Pennines. This directly affects how quickly specific roofing problems develop and which repair approaches last longest in local conditions.
Mortar ridge failure on exposed pitches; lead flashing failure on Victorian town centre stock; nail sickness on 1960s–70s fringe estates. We attend these jobs regularly across Northallerton and carry the most common materials on the vehicle to avoid return visits.
Industry-recognised quality and safety standards.
Written workmanship guarantee on all work.
Fixed quote before we start. No surprises.
We get on the roof before quoting. Always.
Flat roofing from £800. Free surveys, 25-year system guarantees. No call-out fee.
“Period property in town centre — clay plain tile re-roof done correctly. They sourced matching tiles and understood conservation requirements without being told.”
“Velux window had been leaking since it was installed years ago. Turned out to be the wrong flashing kit — replaced it and the leak stopped immediately.”
“Called about ridge tiles after a windy week. On site next day, repointed the full ridge line, spotted a failing flashing we hadn't noticed. Thorough.”
Realistic 2025 prices for Northallerton properties. All quotes are free, written and itemised before work begins.
| Job Type | Typical Cost |
|---|---|
| GRP fibreglass (per m²) | £70–£100/m² |
| EPDM rubber (per m²) | £65–£90/m² |
| Typical extension (20–30m²) GRP | £1,800–£3,200 |
| Typical extension (20–30m²) EPDM | £1,500–£2,800 |
| Bungalow flat roof (50–80m²) | £3,500–£6,000 |
| New ply deck (if required) | £18–£25/m² extra |
All prices are installed costs. Call 01325 000 000 for a free written quote.
The primary cause of premature flat roof failure in Northallerton is inadequate drainage. Open vale of mowbray position with limited shelter from the north — cold easterly winds in winter accelerate mortar deterioration on exposed pitches, and the town sees harder frosts than the sheltered tees valley. A flat roof that ponded water in summer can become a freeze-thaw problem in winter as standing water expands and contracts around the membrane edge. Every flat roof we install in Northallerton is built with a minimum fall of 1:80 to the outlet, and we verify the outlet capacity is adequate for the roof area and the local rainfall load.
Before installing a new flat roof membrane on any property in Northallerton, we inspect the existing ply deck condition. Decks that have been under a failing membrane for years may have absorbed moisture and become structurally compromised. A new membrane installed over a soft or delaminating deck will fail early regardless of membrane quality. We include deck inspection in every survey and price deck replacement separately where required — never fold it into the membrane cost and hope it holds.
Northallerton's climate — open vale of mowbray position with limited shelter from the north — cold easterly winds in winter accelerate mortar deterioration on exposed pitches, and the town sees harder frosts than the sheltered tees valley — makes the choice of flat roof system particularly important. Traditional felt systems have multiple lap joints that fail in wet, frost-prone conditions. GRP is a seamless single-layer system with no joints to fail. EPDM is a single-ply rubber membrane that remains flexible at extreme cold. Both systems significantly outperform felt in the conditions typical of Northallerton and the broader County Durham / North Yorkshire climate.
GRP is a rigid, seamless system good for most extension roof sizes up to around 40m². It has a slightly cleaner finish and can be tinted. EPDM is a flexible rubber membrane better suited to larger areas or roofs with complex geometry — its flexibility handles thermal expansion better over big spans. Both outperform any felt system by a significant margin.
Depends on the age and type. If the roof is under 15 years old and only one area has failed, a targeted repair is often viable. If it's original felt from the 1970s or 1980s, the membrane has degraded across the whole surface — patching one corner when the rest is about to fail is a false economy. We'll give you an honest assessment.
Yes. GRP systems come with a 25-year manufacturer guarantee on the material plus our 10-year workmanship guarantee. EPDM comes with a 20-year material guarantee. We don't install systems we're not prepared to back with paperwork.
Yes. We're registered with the National Federation of Roofing Contractors, which means we meet recognised industry standards for quality, safety and workmanship. All our work comes with a written 10-year workmanship guarantee.
Yes. All quotes are free, no-obligation and provided in writing. We get on the roof to measure and inspect before quoting — we don't estimate from the street. There's no call-out charge for the survey visit.
We cover Darlington and approximately a 20-mile radius including Stockton-on-Tees, Middlesbrough, Newton Aycliffe, Bishop Auckland, Northallerton, Shildon, Spennymoor, Hurworth, Heighington, Ferryhill, Sedgefield and all surrounding villages.
Yes. We carry £5m public liability insurance on all work. We're happy to provide evidence of insurance cover before starting any job. Never use a roofing contractor who can't provide proof of insurance.
No call-out fee. No obligation. 15 miles from Darlington base via the A167 — typically 25–30 minutes.
01325 000 000