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Flat Roofing in Doncaster

Rubber, fibreglass or felt — we fit and repair flat roofs that stay watertight for decades on extensions, garages, dormers and outbuildings across South Yorkshire.

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When to sort your flat roof

Flat roofs take a beating from Yorkshire weather. As a result, older felt in particular has a habit of failing right when the rain arrives. Whether it needs a repair or a full new system, we'll match the right covering to the job. Extensions, dormers and garage roofs across Doncaster are the areas we see this most often. That's because they're the parts of a house most likely to be flat.

  • Ponding water sitting on the roof after rain
  • Splits, cracks or blisters in old felt
  • Leaks into an extension, garage or dormer below
  • Lifting or failed edge trims and flashings
  • A tired felt roof you'd like to upgrade to rubber or fibreglass
  • New extension needing a flat roof from scratch

Three systems, one honest recommendation

EPDM rubber is a one-piece membrane with a genuinely long life, which makes it a strong choice for larger flat roofs and extensions. There's very little to go wrong, since there are so few joins.

GRP fibreglass gives a seamless, tough, walk-on finish, ideal for balconies and dormers. It's a good option wherever the roof will get regular foot traffic.

For garages and outbuildings, felt — modern torch-on felt — is often the cost-effective choice. It suits jobs where budget matters more than a multi-decade lifespan.

How it works

1

Survey

We assess the existing flat roof, its deck and drainage. Then we talk through which system suits the building and your budget.

2

Written quote

You get a clear price with the system specified — EPDM, GRP or felt. It also sets out what's included, from strip-out to trims.

3

Installation

We strip the old covering and repair the deck where needed. Then we fit the new membrane with proper upstands and edge trims.

4

Guaranteed

A watertight, guaranteed finish. Additionally, where the system offers it, manufacturer-backed cover applies to the materials.

Flat roofing FAQs

What types of flat roofing do you install? +
We install EPDM rubber, GRP fibreglass and high-performance torch-on felt. EPDM is a hard-wearing single-sheet rubber that's ideal for extensions and larger flat roofs; GRP fibreglass gives a seamless, walk-on finish popular on balconies and dormers; modern felt remains a cost-effective option for garages and outbuildings.
Should I repair or replace my flat roof? +
A flat roof with a single split, blister or failed lap can often be repaired. But if the covering is old felt that's cracking across the whole surface, holding water, or leaking in several places, a new system is usually the better long-term value. We'll give you an honest recommendation after inspecting it.
Can you fix a leaking flat roof? +
Yes. We repair splits, blisters, failed seams and worn flashings on existing flat roofs. If the roof is near the end of its life we'll tell you, so you're not paying for repairs on a covering that needs replacing.
How long does a flat roof last? +
It depends on the system. A quality EPDM rubber roof, correctly installed, is commonly rated for 30–50 years. GRP fibreglass typically manages 20–30 years as a standard installation, with well-maintained or higher-spec systems reaching 30–40 years or more. Felt has the shortest life of the three — basic or older felt often lasts only 10–15 years, while a modern three-layer torch-on system installed to BS 8217 can reach 20–30 years — which is why many homeowners upgrade to rubber or fibreglass when the time comes to replace.
Do you re-roof garages and extensions? +
We do — flat roofs on garages, extensions, dormers, porches and outbuildings are a big part of what we do across Doncaster. We strip the old covering, check and repair the deck, then fit the new system.

We provide flat roofing across Doncaster homes, properties in Rotherham, Barnsley's streets, Worksop customers, homes in Retford, Mexborough properties and Armthorpe homes — plus the wider Doncaster area. Since we're a local team, help is rarely far away.

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