We provide specialist flat roofing across Purton — from the Church Street stone cottages to the modern estates at Pavenhill and Ridgeway Farm. Purton is 5 miles from our Swindon base, giving fast response times with the right expertise for local conditions.
We provide specialist flat roofing across Purton — from the Church Street stone cottages to the modern estates at Pavenhill and Ridgeway Farm. Purton is 5 miles from our Swindon base, giving fast response times with the right expertise for local conditions.
The 1970s–80s extensions across Pavenhill and Ridgeway Farm used three-layer bitumen felt over chipboard. Exposed ridge-top position accelerates every failure mode — the felt cracks from thermal cycling, the chipboard swells from moisture, and the inadequate falls allow ponding that freezes in winter. Patching is temporary at best.
We lay all flat roofs to BS 6229 standard with minimum 1:40 falls. GRP provides a seamless, rigid membrane ideal for smaller roofs. EPDM offers flexibility for larger areas. Both carry manufacturer-backed guarantees of 20+ years. We recommend based on your specific roof geometry.
When stripping old flat roofs in Purton, we find chipboard deck failure on the majority of properties. We always replace with 18mm marine-grade plywood, check joist condition, and correct the falls before laying the new membrane. The deck is the foundation — get it right and the membrane will last its full design life.
Flat roofs in Purton face specific challenges from exposed ridge-top position. The 1970s–80s rear extensions across Pavenhill and Ridgeway Farm have long exceeded their felt lifespan. Modern GRP and EPDM systems are the only lasting solution. We're just 5 miles away for fast survey and installation.
No call-out fees. Free quotes. 10-year guarantee. Call 0179 329 7084.
0179 329 7084"Kitchen extension had been leaking for two years. They stripped the old felt, replaced the chipboard, and laid GRP fibreglass. Two winters later — bone dry. Best money we've spent on the house."
"Garage roof was a mess. They recommended EPDM rubber for the larger area, fitted it in a day. Neat finish, 20-year guarantee. Very happy with the result."
"Dormer window flat roof was the source of years of damp. They found rotten timber underneath, replaced the deck and laid GRP. Finally properly sorted."
Porch/bay: £800–£1,500. Garage: £1,200–£2,500. Rear extension: £2,500–£5,000. We survey free and recommend the best system for your specific roof. Porch: £800–£1,500. Garage: £1,200–£2,500. Extension: £2,500–£5,000. GRP and EPDM both carry 25–30 year manufacturer guarantees. See our flat roof cost guide for detailed pricing.
GRP for smaller roofs and walkable areas — seamless and very durable. EPDM for larger areas — flexible and handles thermal movement well. Both carry 20+ year guarantees. GRP is seamless, rigid and walkable. EPDM is flexible and better for larger areas. Both massively outperform traditional felt. BS 6229:2018 specifies minimum 1:40 falls. See our GRP vs EPDM comparison.
GRP: 30+ years. EPDM: 25+ years. Both far outlast traditional felt which fails after 10–15 years. The right system with proper falls and ventilation will last decades. We always strip to deck, inspect joists, and build correct falls. No overlaying. Warm deck insulation specified as standard per Building Regulations. See our warm vs cold deck guide.
If the membrane has localised damage, possibly. If the felt is cracked or blistered across the surface, replacement is the only lasting fix. We advise honestly during the free survey. We always strip to deck, inspect joists, and build correct falls. No overlaying. Warm deck insulation specified as standard per Building Regulations. See our warm vs cold deck guide.
We always inspect the deck. If the chipboard has swelled or delaminated — common on older Purton flat roofs — we replace it with marine-grade plywood before laying the new membrane. We always strip to deck, inspect joists, and build correct falls. No overlaying. Warm deck insulation specified as standard per Building Regulations. See our warm vs cold deck guide.
Yes — inadequate ventilation causes condensation that rots the deck from underneath. We always check and upgrade ventilation when fitting new flat roofs. We always strip to deck, inspect joists, and build correct falls. No overlaying. Warm deck insulation specified as standard per Building Regulations. See our warm vs cold deck guide.
Manufacturer-backed guarantees of 20–25 years on both GRP and EPDM, plus our 10-year workmanship guarantee. We always strip to deck, inspect joists, and build correct falls. No overlaying. Warm deck insulation specified as standard per Building Regulations. See our warm vs cold deck guide.
Purton stretches along an east-west ridge at 100m, exposed from both sides with no shelter from the flat farmland surrounding it. Western-end properties around the church catch Atlantic systems first, while eastern-end properties face Cotswold cold fronts. The new Ridgeway Farm estate is already showing builder-grade guttering failures within 5 years of construction.
We strip the old membrane completely, inspect the deck (replacing rotten chipboard with marine-grade plywood where needed), build proper falls using tapered firring strips to ensure positive drainage, install ventilation to prevent condensation, and lay the new GRP or EPDM membrane with mechanical edge trims and proper upstand detailing. Most domestic flat roofs are completed in 1-2 days.
We are NFRC registered, carry £5m public liability insurance, and provide a written 10-year workmanship guarantee on every job. We know Purton's housing stock, its specific climate challenges, and the materials that work best in local conditions. We do not subcontract — our own team handles every job from survey to completion. Call 0179 329 7084 for a free quote.
Traditional three-layer bitumen felt was designed for a 15 to 20 year lifespan. In practice, the felt cracks from thermal cycling, the laps separate as adhesive degrades, and the chipboard deck underneath swells from moisture ingress. Swindon conditions accelerate every stage. The plateau creates wider daily temperature swings than in valley towns, causing more expansion and contraction. Freeze-thaw cycling in winter forces ice into every hairline crack. And the exposed position means more wind uplift stress on membrane edges. Patching these roofs is a temporary measure — the membrane is failing across its entire surface.
We lay all flat roofs to BS 6229 standard with a minimum fall of 1 in 40 using tapered firring strips over the deck. The deck is always marine-grade plywood — never chipboard, which swells when it gets wet. We install tile or slot vents for continuous airflow to prevent condensation. Edge trims are mechanically fixed at 200mm centres. Upstands are formed to a minimum height of 150mm above the finished surface. These details are what separates a flat roof that lasts 30 years from one that fails in 10.
We strip the existing membrane completely — we never overlay new material on top of old. We inspect every board of the deck, replacing any chipboard, OSB or plywood that shows moisture damage, delamination or structural weakness. All replacement decking is 18mm WBP marine-grade plywood. We build falls using tapered firring strips to achieve a minimum 1:40 gradient to the outlet — standing water is the number one killer of flat roofs and correct falls eliminate it. Edge trims are mechanically fixed at 200mm centres with stainless steel screws. Upstands are formed to a minimum 150mm above the finished roof surface. We install ventilation to prevent condensation in the void.
GRP fibreglass carries a Topseal or Cure It manufacturer-backed guarantee of 25-30 years. EPDM rubber carries a Firestone RubberCover or ClassicBond guarantee of 20-25 years. Both systems regularly exceed their guaranteed lifespan in practice. Our own 10-year workmanship guarantee covers the installation, the deck preparation and the detailing.
A well-installed GRP or EPDM flat roof needs minimal maintenance, but a few simple steps will maximise its lifespan. Keep the surface clear of debris — leaves, moss and dirt can block drainage outlets and cause ponding. Check the edges and upstands annually for any lifting or separation, particularly after winter. Inspect the outlet and ensure it is flowing freely after heavy rain. Do not place heavy items on the surface without load-spreading boards. Do not use a pressure washer on EPDM — it can damage the rubber surface. For GRP, avoid dragging furniture or ladders across the surface — the resin coat can be scratched. If you notice any damage, call us early — a small patch repair costs a fraction of the damage that water ingress will cause if left untreated.
The ridge-top wind exposure along Purton's linear layout means we fix every tile mechanically and specify enhanced verge details on both eastern and western gable ends. Properties at the western end near Purton Stoke get the Atlantic weather first; properties at the eastern end face Swindon's plateau winds.
From £150, no call-out fee.
More →Full re-roofs, 10yr guarantee.
More →GRP/EPDM, 25yr guarantees.
More →Same-day 24/7 response.
Call Now →Cleaning, repairs, replacement.
More →Repointing, flashings, stacks.
More →Biocide, 3-5yr protection.
More →uPVC roofline, ventilation.
More →Fitted to your roof.
More →Code 4 flashings, valleys.
More →Repair, matching, re-roofing.
More →Surveys from £120, fee credited.
More →Here is how to tell if this is the right service for your property.
When it is not the answer: If membrane is flexible, deck firm, and leak is from one point, a £200-£400 patch may give years more service.
Check membrane, deck, falls, upstands, outlet.
GRP and EPDM options, itemised.
Strip, new deck, firring strips for falls, membrane, trims, upstands.
10-year workmanship + 25-30yr manufacturer warranty.
| Job | Duration |
|---|---|
| Porch/bay | 1 day |
| Garage | 1-2 days |
| Extension | 2-3 days |
Weather dependent.
Ladder access for most. Scaffold for first-floor flat roofs.
Extended village with 1960s-70s infill estates. Relatively sheltered compared to Swindon. Pavement scaffold and skip permits go through Swindon Borough Council; allow a few working days on streets like High Street, Station Road, The Peak.
Workmanship 10 years. System warranty 25-30 years.
2-3 days. GRP resin odour during cure — close windows below for a few hours.
GRP needs dry conditions and 5°C+. EPDM more tolerant. Slightly lower elevation and more sheltered than the Swindon plateau.
Last updated: August 2026
No call-out fees. No obligation. Local Purton roofers you can trust.
0179 329 7084