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Flat Roof Replacement

Time for a new flat roof?
Make it last 40 years this time.

Stripping a tired felt, GRP or asphalt roof and replacing it with a modern single ply membrane is the single biggest upgrade most flat roofs ever get. Done properly, it'll outlast you in the building.

From £90/m² 20-Yr Warranty 2–4 Day Install Free Survey
Get a Price in 60 Seconds 07807 815181
Newly installed single ply flat roof replacement by Sky Guard
£90
From / m²
20 yr
Warranty
2–4
Day install
40+ yr
Membrane life
What we replace

If your roof is one of these — we’ve done it hundreds of times.

The vast majority of replacements we handle fall into one of four categories.

Old felt roofs

The most common replacement — 1970s–90s felt is usually past saving by year 15.

Failed GRP fibreglass

Cracked or delaminated GRP. Single ply is a far better long-term fix.

Tired EPDM rubber

Shrinkage at edges, glue failures — we replace with mechanically fixed single ply.

Asphalt and chippings

Heavy, dated, and usually leaks at the upstands. Time for something modern.

How it works

From first call to final sign-off — 5 steps.

No drama, no hidden costs, no chasing.

  1. 1

    Free survey

    We come out, measure, photograph the existing build-up, agree what stays and what goes.

  2. 2

    Written quote

    Fixed price within one working day. System specified, warranty terms included.

  3. 3

    Strip out

    Old roof removed cleanly, debris bagged. We sheet-protect surrounding areas.

  4. 4

    Substrate prep

    Deck checked, repaired if needed. New VCL and insulation laid where required.

  5. 5

    New membrane

    Single ply mechanically fixed or adhered. Heat-welded seams, hand-finished detail work.

FAQ

Replacement questions

Quick answers to the things people ask most.

How long does a flat roof replacement take?
Most domestic jobs (20–40 m²) take 2–4 days. Larger extensions or commercial work is scheduled with you in advance.
How much does it cost?
From £90/m² for a single ply replacement. Scaffolding adds £1,000–£2,000 if needed. Insulation upgrade is +£40/m². A typical 30 m² extension costs around £3,500–£5,000 all in. Get an instant estimate.
Do I need scaffolding?
Only if the roof is on a first floor or higher. Single-storey extensions and most garages can be done from ground or a tower scaffold (much cheaper).
Can you upgrade the insulation while you're at it?
Yes — and we strongly recommend it. Building Regs require a U-value of 0.18 W/m²K on replacements. We add PIR insulation board to bring you to spec (+£40/m²) and your heating bills drop noticeably.
What happens to the old roof?
We strip it, bag it, and take it off site. You don't need a skip unless you want one.
What guarantee do I get?
A 20-year manufacturer-backed warranty on the membrane, plus a 10-year workmanship guarantee from us. Both transferable if you sell the building.
Can I just replace part of the roof?
Sometimes — if there's a clear break (e.g. extension vs. main roof). For the same roof area we always replace fully; patching new onto old creates trouble at the join.

Ready for a roof that actually lasts?

Free survey, no hard sell, transparent pricing. Speak to a real roofer in 30 seconds.

Get Free Estimate Call 07807 815181