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▢ Flat Roofing — Pewsham

Flat Roofing Pewsham

GRP fibreglass and EPDM flat roofing specialists in Pewsham — extensions, garages and outbuildings. Correct drainage, proper upstand detailing, 25-year material guarantee. Free no-obligation quotes.

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20+
Years Local
143
5★ Reviews
Free
Quotes
25yr
GRP Guarantee

In short: Flat Roofing in Pewsham: Flat roofing runs £900–£2,500 for a typical extension. We cover Pewsham and the surrounding SN15 area with free quotes, no call-out fee, and a 10-year workmanship guarantee. Failing felt flat roofs are best replaced in GRP or EPDM rather than patched.

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Flat Roofing in Pewsham

Flat Roofing in Pewsham

All flat roofing work across Pewsham and surrounding Wiltshire — same local team, same standards, same guarantee as our Chippenham base.

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GRP Fibreglass

Seamless, UV stable, 25-year material guarantee. Our standard recommendation for domestic extensions. Installed in one day on most standard roofs.

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◯

EPDM Rubber

Better suited to large or complex roof shapes with significant thermal movement. 20-year material guarantee. Excellent performance on wide-span outbuildings.

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💧

Felt Re-Roofing

Budget flat roofing option. Shorter lifespan than GRP or EPDM but appropriate where cost is the primary constraint. We advise honestly on expected service life.

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🔧

Deck Inspection

Included on every flat roof replacement. We inspect boards before laying the new membrane — rotten or damaged deck is replaced as part of the same visit.

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Drainage Correction

Ponding flat roofs have a fall problem, not just a membrane problem. We correct drainage falls as standard on every flat roof replacement — not just relay over the existing profile.

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⚡

Emergency Flat Roof

Sudden flat roof failure causing active water ingress. Same-day temporary seal available. Permanent GRP replacement scheduled within the week.

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Why Pewsham Specifically

Flat Roofing in Pewsham — What Makes This Location Different

Local Climate and Exposure

Pewsham's proximity to Chippenham means identical climate conditions — the primary driver is age, with almost all properties built in the same 1990s–2000s window now entering their first major maintenance cycle simultaneously. For flat roofing work in Pewsham, this means specification choices that reflect the actual conditions rather than generic Wiltshire averages.

Housing Stock Profile

Uniform 1990s–2000s development estate — virtually every property has the same roof specification aging at the same rate. We are 2 miles east from Pewsham — 5 minutes — with no travel surcharge and same local knowledge that applies to every property type in this area.

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Do you need this?

Signs You Need Flat Roofing in Pewsham

Failing felt flat roofs are best replaced in GRP or EPDM rather than patched in Pewsham. Pewsham is a 1990s–2010s Chippenham estate district of modern houses with concrete-tile main roofs and felt or GRP flat-roof extensions. On this kind of stock, the common problems are failing felt flat-roof extensions at end of life, early uPVC guttering joints leaking, and the first signs of tile movement on the older estate stock — and knowing which you are dealing with is the difference between a lasting fix and money wasted.

Flat Roofing technical diagram for Pewsham
National roofing standards illustrated. We advise on your specific Pewsham roof after a free survey.
Local Knowledge

Flat Roofing in Pewsham

Pewsham is the flat roofing capital of the Chippenham portfolio. Almost every 1990s–2000s property on the estate has a single-storey rear extension with an original felt flat roof — now 25–35 years old and entering its end-of-life phase. This is the most common call we receive from Pewsham: flat roof extension failures causing active water ingress through kitchen or dining room ceilings.

We replace Pewsham flat roofs in GRP fibreglass as standard. The process is one day for a standard extension: strip, deck inspection, drainage correction, GRP lamination and trim. In the unlikely event the deck boards are rotted, we replace as part of the same visit. 25-year material guarantee. Free written quote before work starts.

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📍 Serving Pewsham, Wiltshire
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📌 2 miles east (5 minutes from Chippenham)
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📍 All Services in Pewsham
The process

How Flat Roofing Works in Pewsham

1. Strip & inspect

We remove the old covering and inspect the deck for rot — the step most quotes skip.

2. Correct the falls

We check and correct drainage falls so water runs off cleanly rather than ponding.

3. Written quote

A fixed price covering deck repairs, membrane and trims, agreed before work starts.

4. Install the membrane

GRP is laid wet and cures seamless; EPDM is bonded as one sheet. Trims and upstands dressed in.

5. Sign-off & guarantee

The finished roof carries a 25-year material guarantee (GRP) plus our workmanship cover.

Timescales

How Long Flat Roofing Takes

JobTypical duration
Small extension (GRP, up to 15m²)1–2 days
Standard extension (GRP)2–3 days
Garage roof (EPDM)1 day
Deck / board replacement+half to full day
Larger / commercial flat roofper assessment

GRP needs dry conditions to cure; we won't lay fibreglass in rain, so winter jobs are weather-scheduled.

Access

Access, Scaffold & Permits in Pewsham

Pewsham is modern estate housing with good access, driveways and space for scaffold and skips. Pavement scaffold and skip permits in Pewsham go through Wiltshire Council; on tight streets like the estate roads off Pewsham Way we allow extra time for setup and access.

Pricing

Flat Roofing Prices in Pewsham

Flat roofing runs £900–£2,500 for a typical extension. Pewsham pricing tracks Chippenham, adjusted for access on Pewsham's stock.

JobTypical rangeNotes
GRP small extension (up to 15m²)£1,200–£1,80025-year guarantee
GRP standard extension (15–25m²)£1,800–£2,500Seamless fibreglass
EPDM standard extension£900–£1,800Single bonded sheet
Garage roof (GRP or EPDM)£800–£1,600Per garage
Deck / board replacement£150–£400Where timber has gone soft
Larger / commercial flat rooffrom £45/m²Single-ply or GRP

No deposit on jobs under £500. On larger flat roofs, no payment before materials are on site. VAT included. Payment on completion once tested and dry.

Covering SN15 and surrounding postcodes.

Guarantee

Your Pewsham Guarantee

GRP carries a 25-year material guarantee and EPDM 20 years; our workmanship cover sits on top, and the deck and falls — which decide longevity — are guaranteed too.

Pricing Guide

Flat Roof Costs in Pewsham

GRP up to 20m²

£1,200–£2,500
Strip, deck, drainage, installation.

EPDM up to 20m²

£900–£1,800
Best for large or complex shapes.

Felt Re-roof

£600–£1,400
Budget option — shorter lifespan.

Emergency Seal

£150–£400
Temporary fix same day.
Good to know

Disruption, Mess & Weather

A day or two of work over a single room, minimal internal disruption; we clear the old felt and all waste on completion. You do not need to stay home for external work.

EPDM can go on year-round; GRP needs a dry weather window. We temporary-weatherproof if rain interrupts a job. Pewsham sits on the south-eastern edge of Chippenham near the Avon, with some riverside humidity.

Customer Reviews

Flat Roofing Reviews — Pewsham

★★★★★

"GRP flat roof replacement on extension — done properly, first time. Dry for two winters. Free quote was accurate and no hidden additions."

J. Williams · Pewsham homeowner
★★★★★

"Extension flat roof had been leaking for years. Previous roofer patched it twice. These stripped and replaced with GRP. Finally resolved."

S. Carter · Pewsham
★★★★★

"Garage flat roof replaced in EPDM — large complex shape, handled correctly. Clean job, good price."

M. Reynolds · near Pewsham
FAQ

Common Questions

GRP fibreglass up to 20m²: £1,200–£2,500. EPDM up to 20m²: £900–£1,800. Includes strip, deck inspection, drainage correction and installation. Free written quote — call 01249 247 076.

Pewsham is 2 miles east — 5 minutes. No travel surcharge. Free surveys and quotes.

GRP fibreglass carries a 25-year material guarantee and significantly outlasts felt. It's seamless once cured, handles thermal cycling well, and doesn't suffer the joint failures common on felt. We recommend GRP over re-felting in almost all cases.

A standard single-storey extension flat roof up to 25m² is typically completed in one day. Larger or more complex roofs may take two days. We give an accurate timeline in every quote.

Yes — garages, outbuildings and garden buildings are a regular part of our flat roofing work in Pewsham. Same specification and 25-year guarantee as domestic extensions.

If the roof is more than 20 years old and showing active failure, replacement is almost always more cost-effective than repair. We survey and advise honestly — we won't recommend replacement if targeted repair genuinely meets the situation.

GRP fibreglass carries a 25-year material manufacturer's guarantee plus our own 10-year workmanship guarantee. EPDM carries a 20-year material guarantee. Both are provided in writing on completion.

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Free Quote — Flat Roofing Pewsham

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Last updated: August 2026

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