About Topseal

Topseal offer a range of advanced GRP fibreglass roofing systems fitted through a national network of highly trained and approved installers.

Since our flat roof system was introduced back in 1992 it has been installed on millions of square metres of roofs all over the UK.

Topseal is the ultimate fibreglass flat roofing system suitable for both domestic and commercial works.

We continue to innovate and have recently launched a ground breaking direct lay flat roof system. This liquid applied flat roofing system has secured BBA certification and is suitable for refurbishments and new builds.

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Design Your Roof

With a wide range of colours and finishes to choose from Topseal can produce a completely bespoke roof, just the way you want it. Click below to design your perfect Topseal fibreglass flat roof.

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Simulated Lead

Topseal fibreglass is used extensively as a lead/copper replacement or alternative for roofs, gutter linings and complex architectural detail work.

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Installer Verification

Every Topseal installer is allocated a unique verification number to prevent 3rd party misrepresentation. You should always ask any Topseal installer for their verification number. Enter it below to confirm their identity.

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Latest News


  • When is the best time to upgrade your flat roof?

    June 16 2017

    The answer to this is not ‘when it’s leaking!’ The key to taking care of any roof is regular surveys and inspections. If your flat roof is a GRP (Glass Reinforced Polyester) construction, like Topseal Direct Lay, then the chances are that it will last you for over 20 years and will be virtually maintenance free. If your flat roof is made from traditional materials such as Asphalt or Felt, then it is more likely that it will need regular inspections and ongoing maintenance.

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  • Protect a building from lead theft with GRP

    April 13 2017

    Lead has been widely used as a roofing material for hundreds of years. Many historic buildings, such as churches, universities and schools, still feature lead roofs as it is renowned for its durability,

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Guide to flat roofing

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