GRP fibreglass and EPDM rubber flat roofing across Harnham and the SP2 area. Extensions, garages, bay roofs — correctly installed with proper falls and upstands. 25-year guarantee.
Tell us the job in 30 seconds. No pushy sales, no call-out fee.
📞 Call Now: 0172 223 9611Flat roofing in Harnham covers extensions, garages, bay roofs and outbuildings across the area's Victorian terraces and 1930s semis, chalk escarpment suburb. Given upper escarpment: accelerated ridge mortar; lower streets: water meadow humidity, we recommend GRP fibreglass as the primary system for most Harnham properties — its seamless laminate surface handles the local conditions better than felt, with a 25-year guarantee and 30–40 year realistic lifespan.
We cover Harnham and all surrounding SP2 villages for flat roofing installation and replacement. Free surveys, fixed-price quotes.
Given chalk escarpment, south-westerly exposure on upper ground and upper escarpment: accelerated ridge mortar; lower streets: water meadow humidity, GRP fibreglass is our standard recommendation for Harnham. EPDM rubber is an alternative for larger areas above approximately 80m². We do not install new built-up felt as a permanent flat roofing solution — its 10–15 year design life is too short for the conditions in this area.
| System | Per m² | 25m² extension | Lifespan |
|---|---|---|---|
| GRP Fibreglass | £70–£100 | £1,750–£2,500 | 25–40 years |
| EPDM Rubber | £60–£90 | £1,500–£2,250 | 25–35 years |
| Felt (replacement only) | £40–£65 | £1,000–£1,625 | 10–15 years |
Regardless of system, correct fall to outlet (minimum 1:80), proper upstand height (minimum 150mm) and sound deck preparation are essential. On Harnham's older extension stock, deck inspection before installation often reveals water-damaged boarding that must be replaced — we include this in our quoted price, not as a surprise add-on.
Free assessment and fixed-price quote across Harnham and the SP2 area. Call to arrange.
📞 0172 223 9611Flat roofs fail differently to pitched ones — the signs are ponding, splits and blistering rather than slipped tiles.
When it is not the answer: If the membrane is sound and only a flashing or upstand has failed, a localised repair beats a full recover — we'll tell you which you need. Read the full guide.
We check the deck, falls, upstands and outlets, and establish whether it's a repair or a recover.
Itemised quote specifying the system — EPDM rubber, GRP fibreglass or high-performance felt — and the price.
Booked around a dry window; flat-roof systems need dry conditions to bond.
We strip the failed covering, correct the falls and insulation where needed, and lay the new membrane with dressed edges and outlets.
Site cleared, outlets tested, and the guarantee handed over.
| Job | Typical duration |
|---|---|
| Small flat roof repair | 2–4 hours |
| Garage or extension recover | 1–2 days |
| Large flat roof (EPDM/GRP) | 2–4 days |
| Warm-deck rebuild with insulation | 3–5 days |
Membranes need dry, mild conditions to bond — we won't lay in rain or hard frost.
Access is often from a tower or short scaffold depending on height and the deck. Scaffold is specified for: first-floor flat roofs, anything over a garage height, or where edge protection is required - always itemised in your written quote, never a hidden extra, and we arrange it.
A mix of Victorian villas and inter-war and post-war housing close to the Cathedral view; some period stock. Pavement scaffold and skip permits go through Wiltshire Council; allow a few working days on streets like the older lanes off Harnham Road near the watermeadows where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Small flat roof repair | £180–£500 | Localised patch |
| Felt garage roof recover | £800–£1,600 | High-performance felt |
| EPDM rubber roof | £1,600–£4,000 | Single-ply, 20yr+ warranty |
| GRP fibreglass roof | £2,000–£5,000 | Seamless, durable |
| Warm-deck rebuild w/ insulation | £2,500–£6,000 | Meets current regs |
Worked example: An EPDM rubber recover on a typical single-garage roof in Harnham: around £1,400 including strip and disposal.
No deposit on repairs under £500; staged payments on larger jobs with nothing up front before materials are on site. Repairs are standard-rated; a full re-roof usually attracts 5% VAT.
Covering SP2 and surrounding postcodes.
EPDM and GRP systems carry long manufacturer warranties (often 20 years+) alongside our 10-year workmanship guarantee.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Minimal inside the home — work is external, though there may be some odour from adhesives on the day, which clears quickly. You do not need to stay home for external work - we just need power and access agreed in advance.
Flat-roof work is the most weather-sensitive we do; we schedule tightly around dry spells and never leave a deck exposed. Right beside the Avon watermeadows, so damp, moss and blocked valleys are the recurring issues.
"Called for flat roofing in Harnham — they were professional from first call to completion. Free survey, honest quote, turned up when they said they would. Exactly what you want."
"Best roofer in the Harnham area. They knew exactly what the issue was, fixed it properly the first time and left the place spotless. Highly recommend."
"Used them for flat roofing after getting three quotes. Not the cheapest but clearly the most professional. Written guarantee, itemised quote, quality materials. Very happy."
Flat Roofing costs in Harnham depend on property size and scope. GRP fibreglass: £70–£100/m². 25m² extension: £1,750–£2,500. EPDM: £60–£90/m². Free survey — call 0172 223 9611.
Yes — we cover Harnham and all surrounding SP2 villages 24/7. Response time to Harnham is typically 15–20 minutes from our Salisbury base. No call-out fee. Call 0172 223 9611.
Yes — all surveys and quotes in Harnham are completely free with no obligation. We assess your roof, confirm the cause of any issues, and give you a written quote. Given chalk escarpment, south-westerly exposure on upper ground and the specific conditions at Harnham, accurate diagnosis before quoting is essential — we always survey before pricing.
The most frequent calls from Harnham involve lime mortar on Victorian terraces; lead valleys on Old Harnham Road properties. The Victorian terraces and 1930s semis, chalk escarpment suburb and chalk escarpment, south-westerly exposure on upper ground create a specific pattern of deterioration — chalk escarpment, south-westerly exposure on upper ground accelerates standard deterioration. We know Harnham's property stock well and diagnose accurately before recommending any work.
Standard rear extension flat roof (20–40m²) in Harnham: one full day for GRP. Larger areas: two days. Dry conditions required for GRP lamination.
Yes. We are NFRC registered and fully insured for all roofing work in Harnham and across the SP2 area. £5m public liability insurance. All work carries a 10-year written workmanship guarantee. We can provide our registration number and insurance certificate on request.
Yes. Harnham's Victorian terraces and 1930s semis, chalk escarpment suburb includes properties requiring period-appropriate techniques: lime mortar on pre-1920 construction, correct lead code specification, and reclaimed or matched tile sourcing. Given Harnham's conservation area coverage, we are experienced with the planning considerations and material requirements.
No call-out fees. No obligation. Local flat roofing specialists covering Harnham and all of the SP2 area.
0172 223 9611