How much does a flat roof cost to repair (Real UK Prices 2025)

If your flat roof is leaking or starting to crack, you’re probably wondering:

“How much does a flat roof cost to repair?”

Here’s the simple and accurate answer:

In the UK, flat roof repairs cost between £80 and £500, depending on the size of the damage, the material of the roof, and how urgent the repair is.

👉 Small repair: from £80

👉 Medium repair: £150–£300

👉 Larger flat roof repair: up to £500 maximum

Let’s break it down properly so homeowners know exactly what to expect.

Flat Roof Repair Cost Breakdown (2025)

🔹 Small Flat Roof Repairs — £80 to £150

These include:

•Tiny punctures

•Small cracks

•Loose edging

•Small patch repairs

•Minor sealant fixes

Perfect for garages, porches, and small extensions.

🔹 Medium Flat Roof Repairs — £150 to £300

Typical issues:

•Splits in EPDM rubber

•Cracked GRP fibreglass areas

•Blistering patches in felt

•Early leak signs

•Multiple small cracks

These repairs usually take longer and require more material.

🔹 Large Flat Roof Repairs — £300 to £500

This is the maximum cost your client charges for flat roof repairs.

These larger repairs cover:

•Bigger membrane splits

•Widespread blistering

•Large areas of damaged GRP

•Heavy water pooling-related damage

Anything beyond this usually indicates the roof is nearing end-of-life and may need replacement.

EPDM, GRP & Felt Repair Costs

Flat roof repair prices also depend on the material:

🔸 EPDM Rubber Roof Repairs

£80–£250

Typical repairs:

•Splits

•Tears

•Loose corners

EPDM patches last years if applied properly.

🔸 GRP Fibreglass Roof Repairs

£120–£350

Typical repairs:

•Cracks

•Pinholes

•Weakened or delaminated areas

Requires resin, matting, sanding, and topcoat.

🔸 Torch-On Felt Repairs

£60–£200

Short-term solution.

Best for sheds or older roofs nearing replacement.

What About Pitched Roof Repairs?

👉 Pitched roof repair minimum: £350

This covers:

•Slipped/broken tiles

•Ridge repairs

•Verge repairs

•Flashing issues

•Minor storm damage

More complex repairs may cost £450–£650+, depending on access and roof design.

What Affects the Cost of Flat Roof Repairs?

Prices vary due to:

✔ Size of the damaged area

✔ Material type (EPDM, GRP, felt)

✔ Roof height and access

✔ Water damage below the surface

✔ Urgency or emergency callouts

Flat roof damage may look small on the outside, but can hide deeper issues below the membrane

When Repairs Aren’t Enough

A flat roof might need replacing if:

•It’s over 20–25 years old

•Leaks keep coming back

•The material has deteriorated

•Large areas are blistering

•The roof deck is soft or rotten

In these cases, repairing becomes a waste of money — replacement is safer and cheaper long-term.

Need a Flat Roof Repair? Get a Free Inspection

At Correct Way Roofing, we repair flat roofs across Telford and the West Midlands.

We provide:

✔ Affordable repairs (max £500 for flat roofs)

✔ Pitched roof repairs from £350

✔ EPDM & GRP specialists

✔ Emergency callouts available

✔ Guaranteed repairs

✔ Honest advice — no pushy sales

✔ Family-run Telford roofing company

📞 Call Correct Way Roofing for a free on-site inspection and honest price estimate.

Call Us Today