Flat Roofing in Falkirk & Central Scotland
New flat roofs, repairs and re-covers for extensions, garages, dormers and porches — in long-lasting EPDM rubber, GRP fibreglass and felt.
Rated 5 stars by local homeowners
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Guide price: flat roofs from around £1,200 · Free, no-obligation survey and a clear fixed price
10-Year Guarantee
On all our workmanship
25+ Years
Experience in the trade
Family-Run
A local business you can trust
Flat Roofing in Falkirk & Central Scotland
A flat roof only works when it’s installed properly — the wrong system or a poor detail and you’re back to buckets under a leak within a couple of winters. F J Allan & Sons install, repair and re-cover flat roofs across Falkirk, Grangemouth, Stirling, Cumbernauld and the wider Forth Valley, using modern systems that far outlast old-fashioned felt.
Whether it’s a garage, a single-storey extension, a dormer or a porch, we’ll recommend the right system for the job and give you a clear, fixed price.
Flat roof systems we fit
We match the system to the roof, not the other way round.
EPDM Rubber
A single seamless sheet of rubber with no joints to fail — durable, flexible and typically lasting 30+ years. Our most popular flat-roof choice.
GRP Fibreglass
A seamless, hard-wearing fibreglass finish that’s ideal for balconies and walk-on roofs, with a neat, modern look.
Torch-on Felt
A modern high-performance felt in multiple layers — a cost-effective, reliable option done properly with heat-welded seams.
Warm-Deck Insulation
We can upgrade a cold flat roof to a warm-deck build-up, cutting heat loss and condensation on habitable rooms below.
Flat roof problems we fix
Ponding & poor drainage
Standing water that never clears points to falls that are too shallow — we correct the build-up so water runs off.
Splits, blisters & cracks
Old felt goes brittle and splits; we patch where sensible or re-cover for a lasting fix.
Failed seams & upstands
Most flat-roof leaks start at joints, upstands and where the roof meets a wall — exactly where good detailing matters.
Leaking flashings
Failed lead or trims around the edges and abutments let water track in; we re-dress and seal them properly.
Why choose F J Allan?
We’re qualified, insured roofers who fit flat roofs day in, day out — not a general builder having a go. That means the right system, proper falls, heat-welded or bonded seams and clean edge detailing, so your flat roof stays watertight through a Scottish winter. Clear fixed prices, tidy work, and a 10-year workmanship guarantee.
What affects the cost of a flat roof?
We price each flat roof on what it needs. The main factors are:
- The system — EPDM, GRP or felt each have different material and labour costs.
- Size and access — a ground-floor garage vs a first-floor dormer are different jobs.
- The existing deck — whether the timber underneath needs replacing.
- Insulation — whether you’re upgrading to a warm-deck build-up.
You get a clear, fixed price after we’ve seen the roof.
Areas we cover
We cover Falkirk and within about 20 miles — Falkirk, Grangemouth, Larbert, Stenhousemuir, Bonnybridge, Denny, Bo’ness, Polmont, Linlithgow, Stirling, Dunblane, Cumbernauld, Kilsyth, Airdrie, Coatbridge, Bathgate, Livingston and Alloa. Also see our roof repairs and conservatory roof replacement services.
What our customers say
Flat roofing FAQs
How long does a flat roof last?
A modern EPDM rubber or GRP fibreglass flat roof, installed properly, typically lasts 25–30+ years — far longer than old-style felt.
EPDM vs felt vs fibreglass — which is best?
EPDM rubber is our go-to for most roofs (seamless, long-lasting, great value); GRP fibreglass suits walk-on areas and balconies; modern felt is a solid budget option. We’ll advise on the best fit.
Can you repair my flat roof or does it need replacing?
If the deck is sound and the damage is localised we’ll repair it. If the covering is at the end of its life we’ll be honest and recommend a re-cover.
Why does my flat roof keep leaking?
Most flat-roof leaks come from failed seams, upstands or flashings rather than the middle of the roof. We trace the true source and detail it properly.
Get a free, no-obligation quote.
Call 01236 338876 or 07719 413420 | Email info@fjallan.co.uk
Open Monday to Saturday, 9am–5pm.
Flat roofing across the Forth Valley
We also cover the surrounding towns — find your local page: Grangemouth · Larbert · Stirling · Cumbernauld · Airdrie · Coatbridge · Kilsyth · Bo’ness · Linlithgow · Bathgate · Alloa · Bonnybridge · Denny · Polmont · Dunblane · Livingston.
Flat Roofing across the whole Forth Valley
We provide flat roofing in Falkirk, Grangemouth, Larbert, Stirling, Cumbernauld, Airdrie, Coatbridge, Kilsyth, Bo’ness, Linlithgow, Bathgate, Alloa, Bonnybridge, Denny, Polmont, Dunblane and Livingston, and right across Central Scotland. Wherever you are in the Forth Valley, you get the same qualified, family-run team, the same 10-year workmanship guarantee, and a clear fixed price after a free survey. See every town on our Areas We Cover page.