roofing materials for flat roofs The Best Option for UK Homes (2025 Guide)

Flat roofs are popular on UK extensions, garages, dormers, and porches — but choosing the right flat roofing material is what makes the difference between 20 years of protection and constant leaks.

If you’re planning a new flat roof or replacing an old one, here are the best flat roofing materials for UK homes in 2025 — including costs, lifespans, and the pros and cons of each.

1. EPDM Rubber Roofing

Best for: Extensions, garages, dormers, porches

Average cost: Around £70 per m²

Lifespan: 20–25 years

EPDM is one of the most popular flat roofing systems in the UK because it’s:

•Installed in one seamless sheet

•UV and weather resistant

•Very low maintenance

•Flexible, so it won’t crack

•Cost-effective

It’s lightweight, durable, and ideal for most residential flat roofs.

For homeowners looking for long-term protection without overspending, EPDM is the best value.

2. GRP Fibreglass Roofing

Best for: Extensions, high-visibility areas, premium projects

Lifespan: 25+ years

Appearance: Sleek, seamless, modern finish

GRP (Glass Reinforced Plastic) is known for its incredible durability and strength.

It creates a completely seamless, watertight layer — perfect for areas exposed to constant weather.

Benefits:

•Ultra-strong and impact-resistant

•No seams, no weak points

•UV-resistant

•Works well on balconies and walk-on areas

•Very long lifespan

GRP costs more than EPDM but offers a premium finish and exceptional durability.

3. Torch-On Felt Roofing

Best for: Low-budget flat roofs

Lifespan: 10–15 years

Torch-on felt is a traditional flat roofing material. While it’s not as long-lasting as EPDM or GRP, it can still be suitable for small sheds or budget projects.

Pros:

•Low cost

•Quick to install

•Repairs are easy

Cons:

•Shorter lifespan

•More prone to cracking

•Not ideal for larger extensions

Most homeowners now prefer modern systems like EPDM or GRP.

4. PVC Single-Ply Roofing

Best for: Large commercial roofs (not common for homes)

Lifespan: 20–30 years

PVC roofs are strong, lightweight, and heat-welded at the seams for excellent waterproofing.

However, they’re typically used on commercial buildings because of their installation cost and specialist equipment requirements.

What Is the Best Flat Roofing Material in the UK?

For most homeowners:

⭐ EPDM Rubber Roofing is the best overall option

Affordable, long-lasting, and ideal for garages, extensions, and porches.

For premium projects:

⭐ GRP Fibreglass Roofing offers the strongest, sleekest finish

Perfect for modern homes or where the roof is visible from above.

Most Common Flat Roof Costs (2025)

•EPDM flat roof: ~ £70 per m²

•GRP fibreglass: Higher cost, premium lifespan

•Felt roof: Cheaper, but shorter lifespan

Correct Way Roofing installs both EPDM and GRP — the two most recommended flat roofing systems in the UK.

How to Choose the Right Material?

Ask yourself:

✔ Do you want the longest lifespan? → GRP

✔ Do you want the best value? → EPDM

✔ Do you need a balcony or walk-on roof? → GRP

✔ Are you replacing an old garage roof? → EPDM

If you’re unsure, a free inspection will tell you exactly what your roof needs.

Get Expert Advice for Your Flat Roof

At Correct Way Roofing, we install EPDM and GRP flat roofs across Telford and Shrewsbury,Wolverhampton,stafford,stoke-on-trent,Dudley,Birmingham,Walsall,Kidderminster,Cannock,Bridgnorth.

We provide:

✔ Free roof surveys

✔ Clear, fixed quotes

✔ Honest advice

✔ Long-lasting installations

✔ Guaranteed workmanship

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

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