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


  • GRP Training Kent

    December 08 2017

    Are you looking for GRP Training in Kent? If so, Topseal have the market-leading product, and with training you could be on our approved database of installers.

    ...Continue reading

  • Topseal Installers London - No 1 for Fibreglass Roofing

    November 08 2017

    If you are looking for a flat roof to be installed or repaired in London, then Topseal are the people to call. Our team of approved Topseal installers are trained to the highest standards and are experts in flat roof installation and maintenance in London and beyond.

    ...Continue reading

Guide to flat roofing

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