EPDM rubber, felt and single-ply membrane flat roofing for extensions, garages and dormers. Long material guarantees.
As one of the trusted flat roofing companies covering Portsmouth and Hampshire, we install EPDM rubber, felt and single-ply membrane systems on extensions, garages, dormers, porches and bay windows across the South Coast. Failing flat roofs are the single biggest source of leaks in UK homes — most of the trouble comes from old felt installs from the 1980s and 90s that were good for 10-15 years and have now had 30. Modern EPDM and single-ply systems are completely different products; properly fitted, both routinely last 30-50+ years with very little maintenance. Choosing the right flat roof contractor makes the difference between a flat roofing installation that lasts 10 years and one that lasts 50+. We don't fit GRP fibreglass — in our experience the material is too rigid for UK building movement and tends to crack at junctions over time. Where the existing decking is sound we re-use it; where it isn't, we strip and replace. Falls are checked or rebuilt so water actually leaves the roof. As Hampshire Roofing Specialists we'll talk through the system options in plain English and provide a free written quote within 48 hours covering the full flat roofing installation, with the relevant pros and cons of each system for your specific roof.
One-piece rubber membrane, no seams on most domestic roofs. Lifespan 50+ years. Our default recommendation for most flat roofs.
Three-layer torch-on felt. The budget option, 10-15 year lifespan. Honest answer: rarely worth it any more for a permanent roof.
PVC and TPO single-ply for larger residential and commercial flat roofs where higher performance is needed. 30-40 year lifespan.
Single-storey kitchen, dining and bedroom extensions. Insulated decks, edge trims, and proper integration with the existing roof.
Detached and integral garage roofs. Most done in a single day in EPDM with new edge trims and gutter integration.
Flat-roof dormers re-covered in EPDM with proper lead flashings into the main roof. Common job on Portsmouth Victorian terraces.
Small porch and bay window roofs in EPDM or felt. Often a half-day job, scaffolding rarely needed.
Honest answer first — if a repair will only buy you 12 months on a roof that's nearly done, we'll say so.
We come out, climb up, take photos and explain what we find in plain English. No charge, no follow-up sales calls.
Itemised, fixed-price quote within 48 hours. Materials specified by name. No hidden extras on the day.
Agreed date booked, fully scaffolded where needed, all materials delivered to site before we start.
10-year workmanship guarantee, site swept clean, after-photos sent before we collect payment.
| EPDM Rubber | Felt | Single-Ply Membrane | |
|---|---|---|---|
| Lifespan | 50+ years | 10-15 years | 30-40 years |
| Cost (£/m²) | £90-£130 | £80-£110 | £110-£160 |
| Maintenance | Effectively none | Annual checks | Low — periodic seam checks |
| Best for | Most domestic flat roofs | Tight-budget outbuildings | Commercial and larger residential roofs |
Honest indicative pricing. Real quotes depend on access and condition. Free written quote within 48 hours.
EPDM rubber
From £90/m²
Typical £90-£130/m² installed. Our default recommendation — seamless on most domestic roofs, 50+ year lifespan.
Felt (3-layer torch-on)
From £80/m²
Typical £80-£110/m² installed. Budget option, 10-15 year lifespan.
Single-ply membrane
From £110/m²
Typical £110-£160/m² installed. Best for larger residential and commercial flat roofs.
Scaffolding
Scaffolding is usually quoted separately. Most jobs require scaffolding ranging from £300-£1,500+ depending on size, number of lifts and access. We arrange and supply scaffolding as part of the overall package — it's included in your written quote so there are no surprises.
For flat roofs with windows, gutters, pipes or other detailing, pricing is calculated per linear metre rather than per m². We'll explain this in your quote.
All prices indicative. Free written quote within 48 hours.
A few examples of recent flat roofing work we've completed in and around Portsmouth.
Failing flat roof between two parapet walls on a Portsmouth extension stripped back to deck. New insulation, vapour barrier and three-layer torch-on felt installed with full lead chase flashings into both parapets. 20-year manufacturer-backed guarantee.
Old felt roof on a Portsmouth garage cut back and renewed in mineral-finish felt with new welted drip edges and fresh UPVC fascia trim. Site cleared the same day, no fuss, fixed price.
"New flat roof on the garage in EPDM. In and out in two days, perfect job, fair price. Has not leaked through three winters."
— Mark T., Lee-on-the-Solent
"Replaced our extension roof in EPDM after years of patching. Wish we'd done it sooner — proper job, 20-year guarantee."
— Helen R., Park Gate
"Old felt roof on the dormer was on its last legs. Re-covered in GRP, neat lead detail back into the main roof. Top quality."
— Steve A., Hayling Island
We provide flat roofing across Portsmouth, Hampshire and within 40 miles of our Portsmouth base.
Flat Roofing questions we hear most often. Don't see yours? Call us.
For most domestic flat roofs in Hampshire, EPDM is our default — one-piece, no seams, 50-year lifespan, weathers UK rain and UV well. Single-ply membrane suits larger or commercial roofs. Felt is the budget option but rarely the smart spend.
Slipped tiles, leaks, storm damage and isolated faults — fixed properly the first time.
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Complete roof replacements built to last 50+ years. Premium materials, 10-year workmanship guarantee.
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Storm damage, active leaks, fallen trees. Same-day make-safe across Hampshire.
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