Flat Roof Replacement · United Kingdom
A roof that stops leaking — and stays that way.
Combehill Roofing surveys, specifies, and installs flat roof replacements with written quotes, quality membranes, and no hidden costs. From first call to final inspection.
Get your free roof survey- Written workmanship guarantee
- Free site survey, no obligation
- Itemised quote — no vague estimates
A failing flat roof doesn't fix itself.
Blistering felt, standing water, damp patches on ceilings — these are signs the membrane has reached the end of its life. Patching buys time but not much of it. The right move is a full replacement using a modern system that carries a proper manufacturer warranty.
At Combehill Roofing, we don't guess over the phone. We visit, we measure, we check the decking, and we give you a clear written quote before a single tile is lifted.
Average lifespan of old felt
10–15 years
vs. modern EPDM & GRP systems
25–40+ years
What you get with Combehill Roofing
Every flat roof replacement we carry out is built around one thing: a result that holds up in British weather and doesn't need revisiting.
Free site survey
We come to you, assess the decking condition, drainage, and falls, and specify the right system — before any money changes hands.
Itemised written quote
You receive a line-by-line breakdown — materials, labour, disposal, access — so you know exactly what you're paying for and why.
Quality-rated membrane systems
We install EPDM rubber, GRP fibreglass, and modified bitumen, each carrying the manufacturer's own material warranty on top of our workmanship guarantee.
Honest, fixed pricing
The price in the quote is the price on the invoice. If we encounter unexpected decking rot, we tell you before we proceed — not after.
Written workmanship guarantee
Every installation is backed by a documented guarantee covering our workmanship, separate from — and additional to — the membrane manufacturer's warranty.
Proper site management
We protect your property during work, manage all waste removal, and leave the site clean at the end of each day — not just at the end of the job.
Four steps from enquiry to weathertight roof
A straightforward process designed to keep you informed at every stage — no surprises, no pressure.
You enquire
Fill in the form below or call us. Tell us roughly what you've got — a garage roof, a flat-roofed extension, a dormer. That's enough to start.
We survey
A Combehill Roofing surveyor visits at a time that suits you. We inspect the membrane, the decking, the drainage, and any detailing around upstands and edges.
We quote
You receive a written, itemised quote within a few working days. We explain what we recommend and why. No chasing, no hard sell.
We install
Our crew arrives on the agreed date, works cleanly, and leaves you with a weathertight roof, a signed-off inspection, and your guarantee documents.
Old felt and failing decking removed before the new membrane system goes in — exactly the kind of survey Combehill Roofing carries out before every quote.
What our customers say
★★★★★"We'd had three different roofers patch our flat roof over four years. Combehill Roofing came out, told us honestly the felt was too far gone, and replaced it with EPDM. Eighteen months later, not a drop."
★★★★★"The quote came through exactly as discussed — line by line, no surprises. The crew finished the garage roof in two days, cleaned everything up, and posted the guarantee paperwork the same week."
★★★★★"We had a flat-roofed extension with standing water every winter. Combehill Roofing re-graded the falls as part of the replacement. The drainage problem that had been there for years was fixed properly."
Built on straight dealing and solid materials
Fully insured
Public liability and employer's liability cover on every job, regardless of size.
Written contracts
Every job is covered by a signed scope of works — what we're doing, what we're using, what it costs.
Workmanship guarantee
A documented guarantee covering our installation, separate from and additional to the manufacturer's material warranty.
No cold-call pricing
We don't quote without a survey. Phone estimates are guesses; ours are based on what we've actually measured.
Ready to stop patching and start fixing?
A free, no-obligation survey is the only way to know what your flat roof actually needs. We'll tell you the truth — even if that truth is "not yet".
Book a free survey todayFrequently asked questions
Straight answers to the questions we hear most often about flat roof replacement.
How long does a flat roof replacement take?
Most residential flat roof replacements are completed within one to three days, depending on the roof size and the membrane system chosen. We give you a realistic programme at the survey stage so there are no surprises on day one.
What materials do you use for flat roof replacements?
We work with EPDM rubber, GRP fibreglass, and modified bitumen systems, selecting the right material for your roof's size, drainage falls, and exposure level. We explain the options clearly before any work begins so you can make an informed decision.
Do I need planning permission to replace a flat roof?
Like-for-like flat roof replacements typically fall under permitted development in England, Scotland, and Wales. If your property is listed or sits within a conservation area, different rules may apply — we'll flag this at the survey and advise on the correct steps.
How much does a flat roof replacement cost?
Cost depends on roof area, access requirements, decking condition, and the membrane system you choose. We provide a written, itemised quote after a free site survey. We don't give vague estimates over the phone because they're rarely accurate.
Is the work guaranteed?
Yes. Every flat roof we install comes with a written workmanship guarantee covering our installation. The membrane manufacturer's material warranty sits on top of that, giving you layered, documented protection in writing.
Get your free roof survey
Tell us about your roof and we'll arrange a visit at a time that suits you. A Combehill Roofing surveyor will assess the job properly and send you a written, itemised quote — no guesswork, no pressure.
- We respond within one working day
- Survey is free and carries no obligation
- No sales calls — just a straight conversation
Your details
Do your homework
Check Any Roofer Before You Sign
Roofing is one of the easiest trades to get wrong and one of the hardest to inspect afterwards. These are the UK bodies and registers homeowners use to verify a contractor, plus established roofing firms working in the same trade.
Industry bodies & contractor registers
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NFRC
The UK’s largest roofing trade association, vetting members by site inspection and code of practice.
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NFRC — Find a member
Search vetted NFRC roofing contractors by area to confirm a firm is genuinely a member.
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NFRC Competent Person Scheme
The roofing-specific scheme letting contractors self-certify refurbishment work in England and Wales.
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TrustMark
The UK’s only government-endorsed quality scheme for work carried out in and around the home.
Established UK roofing firms
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R L Lovatt
Roofing installations, repairs and solar across the North West, in business for over 60 years.
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Homecraft Roofing & Building
Roofing and general building contractor covering London and the surrounding counties.
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Robinsons Roofing
Roofing company handling domestic repairs, re-roofs and flat roofing.
Every organisation and company named above is an independent third party. We are not affiliated with, endorsed by, partnered with, or a member of any of them — these links are neutral starting points for your own research. Links open in a new tab.