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


  • Flat Roof Repairs

    October 03 2018

    Topseal is the UK’s leading supplier of GRP flat roofing systems and we boast a product which makes flat roof repairs quicker, more affordable yet still every bit as long lasting.

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  • London Flat Roofing - Your best solution

    August 22 2018

    At Topseal, we have been a leading provider of flat roofing in London for decades, with more than a million square metres of our roofing installed. For flat roofing solutions in London, you will not be better served than right here - at Topseal.

    ...Continue reading

Guide to flat roofing

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