Flat roofing specialists in Cosham. Cosham's 1930s semi rear extensions and 1970s additions are a major source of flat roofing work in the area — many have been overlaid multiple times and have now reached the point where full strip and replacement is required. GRP, EPDM and felt specified correctly for Cosham's local conditions.
GRP fibreglass is specified on most Cosham flat roofs particularly south and west-facing positions with direct sun and salt exposure. EPDM for larger areas. Standard felt not recommended for exposed positions.
We survey the deck as part of every Cosham flat roof survey. Any softness, rot or structural movement is identified and included in the quote upfront. No mid-job surprises.
GRP from 95 pounds per m2 with a 25-year guarantee. EPDM from 75 pounds per m2 with a 20 to 25-year life. Standard felt from 50 pounds per m2 with a shorter coastal life. System must be correct for position.
Cosham's 1930s semi rear extensions and 1970s additions are a major source of flat roofing work in the area — many have been overlaid multiple times and have now reached the point where full strip and replacement is required. We specify GRP fibreglass for most Cosham flat roofs — particularly south and west-facing positions where UV and salt exposure are highest. EPDM rubber is our recommendation for larger areas where GRP costs become prohibitive. Standard felt is not recommended for exposed positions in this part of Hampshire.
Before specifying any system, we survey the deck. Cosham's 1970s extension decks in Cosham frequently show edge rot and centre softness from multiple overlay layers trapping moisture against the original deck. We assess deck condition as part of every survey — any softness, rot or structural movement is identified and included in the quote upfront. No mid-job surprises.
GRP fibreglass costs from £95 to £135 per m2 with a 25-year guarantee. EPDM rubber costs from £75 to £100 per m2 with a 20 to 25-year life. Torch-on felt costs from £50 to £70 per m2 but has a 10 to 15-year life in Cosham's conditions. We give honest advice on which system is right for the specific location.
| Service | Cost Guide | Notes |
|---|---|---|
| GRP fibreglass | From £95/m2 | 25-year guarantee |
| EPDM rubber | From £75/m2 | 20–25 year life |
| Torch-on felt | From £50/m2 | 10–15 years in local conditions |
| Deck replacement (if needed) | From £45/m2 | Identified in survey, quoted upfront |
"1930s semi on Drayton Lane — re-roof the second time for this property. Portsmouth Roofing was honest that the tiles were past repair and specified the right modern equivalent. No pressure, good advice."
"Nail sickness on our post-war Cosham property. Both main slopes assessed and re-fixed with stainless. Explained exactly what nail sickness means and what to watch for."
"Flat roof on our 1970s rear extension — GRP in a day. They matched the upstand height to the existing brickwork exactly. Neat finish."
Yes — Cosham is within our core service area. Call 0239 307 1334 for availability and free quote.
Yes — free, no-obligation survey and written quote before any work starts. No call-out fee.
Yes. NFRC registration, full public liability insurance and 10-year written guarantee on all work.
Most jobs are surveyed within 48 hours and started within 1–2 weeks. Emergency work is available same day — call 0239 307 1334.
GRP for most positions. EPDM for larger areas. We do not recommend standard felt for exposed or south-facing positions in Cosham's coastal conditions.
GRP: 25–30 years. EPDM: 20–25 years. Felt: 10–15 years in Cosham's conditions. Correct specification for exposure position is critical.
Yes — deck condition is assessed in the survey and any replacement is included in the quote upfront.
No call-out fees. No obligation. Local Portsmouth roofers covering this area.
0239 307 1334