Service
Flat Roofs
Long-life flat roofs for extensions, garages, dormers and contemporary new builds — properly detailed at every upstand, drip and outlet so they actually last. Most flat roof failures aren't the membrane — they're the details. We get the details right.
What's included
- Single-ply EPDM rubber (Firestone RubberCover, Permaroof) — 25-year guarantee
- GRP fibreglass with coloured topcoat — seamless, walkable, 25-year life
- High-performance torch-on and cold-applied felt systems
- Warm and cold deck construction to current Building Regs
- Skylight, lantern, dome and access hatch installation
- Insulation upgrades to U-value 0.18 W/m²K or better
Old three-layer felt roofs typically fail at 12–15 years. They blister, split, lose their granular topcoat and start letting water past at the upstands. Modern alternatives — single-ply EPDM rubber, GRP fibreglass and high-performance polyester-reinforced felt — properly installed will last 25 years or more with no maintenance.
EPDM is our most-specified system for domestic extensions and garages: a single sheet of 1.2mm rubber, mechanically or fully adhered, with welded upstand details. No seams across the field, no bitumen smell, no hot work, and a true 25-year manufacturer guarantee.
GRP fibreglass gives you a glass-hard, seamless, walk-on finish ideal for balconies and roof terraces. We laminate in three layers over an OSB3 deck, finished with a pigmented topcoat in your choice of colour. Where insulation is failing, we install a full warm deck build-up underneath that brings the roof up to current Part L standards.
Whichever system we recommend, every detail is properly formed — drip trims at the eaves, welded upstands at abutments, lead-dressed cover flashings, and bonded outlet sumps. That's why our flat roofs don't come back to us.
Warning signs
When you should call us in
- Bubbling, blistering or splitting felt
- Standing water more than 24 hours after rain
- Damp patches, drips or staining on the ceiling below
- Gravel chippings missing from the surface (felt UV protection failing)
- Cracked or pulled-away upstands at the wall
How we work
Our process, step by step
- 1Survey
Roof and deck inspection, moisture readings, U-value calculation, fixed-price quote.
- 2Strip & insulate
Old covering and any wet insulation removed; new insulation and OSB3 deck installed if required.
- 3Install
EPDM, GRP or felt installed by manufacturer-trained roofers, all upstands and details fully formed.
- 4Sign-off
Manufacturer-backed guarantee registered in your name, written workmanship guarantee, photo pack.
Frequently asked
Flat Roofs questions, answered honestly.
EPDM rubber or GRP fibreglass — which is better?
EPDM is faster, slightly cheaper and ideal for roofs you don't walk on. GRP is glass-hard, seamless, takes foot traffic and looks better on visible roofs and balconies. We'll quote both with honest pros and cons.
Will I need new insulation?
Building Regulations require the roof to meet current U-values when more than 50% of the covering is replaced. In practice, almost every flat roof we re-cover gets an insulation upgrade as part of the job.
How long does a flat roof installation take?
A typical garage roof: 1–2 days. A 30 m² extension roof with insulation upgrade: 3–4 days. Larger commercial roofs by quotation.
Verified customer reviews
What customers say about our roofing work.
Hampshire and Dorset homeowners on the work Mike and the team have carried out for them.
"Storm Isha took a dozen tiles off our roof on a Sunday afternoon. Mike answered the phone himself, was on site within two hours, tarped the whole side that night and had the permanent repair done the following Tuesday. He showed me photos before and after, talked me through the insurance claim, and didn't take a penny until I was happy. You don't get service like that any more."
"We had three roofers quote for stripping and re-covering our 1970s detached. Mike was the only one who actually got up on the roof with a ladder, lifted tiles, checked the battens and showed me where the felt had perished. His quote wasn't the cheapest but it was the only honest one. The job took five days, the skip was emptied daily, and the lads even hoovered the loft when they were done."
"Re-roofed our 1930s semi in natural Welsh slate. Mike sourced reclaimed slates that matched the next-door neighbour's roof exactly so the terrace still looks uniform. The leadwork around the chimney is a piece of art. Two of our neighbours have already booked him in."
"Our extension flat roof had been patched four times by the original builder and still leaked. Mike stripped it back to the deck, found rotten OSB nobody had mentioned, replaced it, upgraded the insulation and installed a one-piece EPDM membrane. Two heavy storms since and not a drop. Fair price, immaculate finish."
"Damp patch on the chimney breast turned out to be failed flashing and 60-year-old mortar. Mike rebuilt the top three courses, fitted new code 5 lead step flashing and repointed the whole stack. He even rebedded a wobbly pot I hadn't asked about, no extra charge. A proper tradesman."
"Two surveyors had told us our house was unmortgageable because of the spray foam in the loft. Mike removed the lot in three days, gave us a full written report with photos of every rafter, and the next surveyor signed it off without a fuss. Sale completed last week. Genuinely life-changing service."
Free roof inspection · no hidden costs
Get a proper roof, from people who actually answer the phone.
Covering all of Hampshire, Dorset and surrounding areas.