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


  • 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,

    ...Continue reading

  • Become a Topseal Approved installer!

    March 23 2017

    “There’s good news for roofers and contractors - the market for flat roofing has grown steadily over the last two years (source AMA Research*). Although growth has been steady, it has been continuous

    ...Continue reading

Guide to flat roofing

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