Durham at a glance
- Postcode districts
- DH1
- Population
- about 47,785 (GeoNames)
- Council area
- Durham County Council
- Building approval
- Durham County Council building control, or a registered building control approver
- Nearest main town
- Sunderland, about 12 miles
- Guide price region
- North East (−7% on West Midlands rates)
Why choose GRP fibreglass roofing in Durham?
Some Durham homeowners pick GRP for appearance alone. The topcoat comes in several colours, the trims are moulded to match, and the finished roof looks tidy from upstairs windows. With good laying conditions and a sound deck, a GRP roof typically lasts 20 years or more.
Around Durham, flat roofs are common on newer estates where the first extension roofs are now being replaced and on terraced streets with flat-roofed rear kitchens and bathrooms. England averages roughly 870 mm of rain a year; the North East is drier than the west but cold and windy near the coast, so wind uplift and freeze-thaw are in the specification.
How much does a GRP fibreglass roof cost in Durham?
For Durham we use North East rates: £2,800–£5,000 is the guide for a 20 m² extension roof in GRP with a new deck and insulation, VAT included. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Extension (20 m²), GRP, new deck + insulation | £2,800–£5,000 |
| Dormer (8 m²), GRP, scaffold | £1,300–£2,450 |
| Single garage (18 m²), GRP fibreglass | £1,650–£3,000 |
| Single garage (18 m²), EPDM rubber | £1,500–£2,600 |
| Extension (20 m²), EPDM, new deck + insulation | £2,600–£4,550 |
How long does a GRP roof last, and is it guaranteed?
A properly laid GRP roof typically lasts 20 to 40 years. The range is wide because so much depends on the laminate being fully wetted out, the deck staying dry and stable, and the topcoat being renewed if it wears.
When GRP fails early, the cause is usually one of these:
- resin laid in damp or cold conditions that never fully cured;
- cracks at board joints or trims where movement was not allowed for;
- a deck that was wet, soft or poorly fixed before laminating;
- a thin or patchy topcoat that has weathered through.
On guarantees, manufacturer material guarantees are available on many specified GRP systems, and some need a registered build-up or an approved installer. Where registration is possible, we do it for you. Every re-roof also comes with our written workmanship guarantee, with the length set out in your quote, and you can ask about insurance-backed options. Read more in our guarantees guide.
What's included?
- New OSB3 or plywood deck, fixed at close centres
- Removal of the old covering and disposal of waste
- Resin and glass-mat laminate with taped and reinforced joints
- Moulded GRP trims, kerbs and upstands
Building regulations in England
Replacing more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof is insulated to around 0.16 W/m²K where that's technically and economically feasible, and the work is notified to building control: the council or a registered building control approver, unless a registered competent person self-certifies it. A roof on a new extension is built to 0.15 W/m²K. Patch repairs, and most unheated detached garages, don't trigger the upgrade. Structural changes, or a new covering that adds 15% or more to the roof's weight, also need approval. More on the rules.
Which nearby areas do we also cover?
- Spennymoor · 5 mi
- Chester-le-Street · 6 mi
- Houghton-Le-Spring · 6 mi
- Stanley · 8 mi
- Washington · 9 mi
- Bishop Auckland · 9 mi
GRP fibreglass roofing in Durham: questions
Do you cover Durham?
Yes. Durham is part of our County Durham coverage, including postcode districts DH1. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Durham?
Where the work needs approval it goes to Durham County Council building control, or a registered building control approver. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does a GRP fibreglass roof cost in Durham?
£2,800–£5,000 for a 20 m² extension roof in GRP with a new deck and insulation, at North East guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
Can GRP be laid over an existing felt roof?
Generally no. GRP needs a clean, dry, rigid timber deck, so the old felt is usually stripped and the boards replaced before laminating.
Can you walk on a GRP roof?
Yes, a correctly laid GRP roof takes occasional foot traffic, such as cleaning windows or maintaining plant. For a regular walkway or terrace, an anti-slip topcoat and a suitable specification are needed.