Frequently Asked Questions
How long does a flat roof last?
The lifespan of a flat roof depends on the material used and the quality of installation. Typically:
Felt roofs last 10–15 years
EPDM rubber roofs last 20–30 years
GRP fibreglass roofs last 25–30 years
PVC or TPO roofs can last 20+ years
Regular maintenance can help maximise longevity.
How much does it cost to replace a flat roof?
Costs vary by size, material, and roof condition. On average in the UK:
Felt: £40–£70 per m²
EPDM: £70–£100 per m²
GRP: £80–£120 per m²
Full replacement for an average garage or extension typically ranges from £1,200 to £4,000.
Get in touch for a free, no-obligation quote.
Can you repair a leaking flat roof, or does it need replacing?
In many cases, minor leaks can be repaired without a full replacement. If your roof has extensive damage, sagging, or is near the end of its lifespan, a replacement may be the better long-term solution. We assess each case individually and advise honestly.
Do I need planning permission to replace my flat roof?
In most cases, no planning permission is required if you’re replacing like for like. However, if you’re:
Changing the height or shape of the roof
Installing insulation that alters appearance
Adding a roof terrace
…you may need approval. We’re happy to advise during your quote.
What causes flat roof leaks?
Common causes include:
Ponding water (poor drainage)
Cracked or split membranes
Weather damage (sun or frost)
Faulty installation
Blocked outlets or gutters
Regular maintenance can prevent most leaks before they start.
