Guaranteed to last a generation, designed to last a lifetime.

Topseal is the ultimate BBA Certified fibreglass flat roofing system. Topseal GRP (also known as fibreglass) roofing systems are installed exclusively by fully trained and approved installers and supplied with a 20 - 40 year product and workmanship guarantee with the back-up of a full customer service, technical support and quality control team.

Here are just a few of the reasons why Topseal is the ultimate roofing system:

  • 20-40 year product & workmanship guarantee with an optional insolvency guarantee against workmanship.
  • Proven performance with over a million square metres fitted over the last 20 years and still going strong!
  • Versatile and flexible for new build, replacement roofs, listed or iconic buildings.
  • Only fitted by trained and Topseal approved installation teams UK wide.
  • Environmentally sustainable by design and safe to install. No heat required.
  • Fire Retardant and completely UV resistant.
  • Over 1,000 different combinations of colours, and specialist finishes available.

Become an
Approved Installer

Information on how to become an approved
installer of the Topseal range of fibreglass flat
roofing systems.

Find out more

& Certified

ISO:9001 Certified

International quality standard. This international quality standard is independent confirmation that we are focused on delivering customer satisfaction through a reliable and standardised process of operating our business.

ISO:14001 Certified

This is the International Standard for Environmental Management. This means we are committed to operating an effective Environmental Management System (EMS) meeting all specified requirements.

BBA Approved

This is a guarantee that the stated performance of the product has been independently tested and verified.

Sustainable & Safe

Topseal is a truly ‘green’ roofing system. The timber decking used is from fully certified FSC (Forestry Stewardship Council) members and the product is applied without the need for heat, so installation is both safe and environmentally neutral.

As well as our internationally recognised ISO:14001 environmental management certification.


GRP has been established as the gold standard for containing or excluding water in a number of demanding applications such as boats, wind turbines or water tanks. This technology has been specially adapted in the UK by Topseal’s research and development.

A Range of Options
for the Perfect Roof

Topseal is available in a wide range of colours and finishes to a bespoke roof including colours to match RAL and BS4800 colour standards. For historic properties rolled rib joints can be incorporated to give the appearance of lead, while a clean contemporary style can be achieved with integrated hidden gutters.


Installers you
can Trust

Any GRP roofing system is only as good as the team that installs it. Every Topseal approved installer has passed the comprehensive Topseal training course, which covers every aspect of installation, product knowledge and customer service. All installers have access to full industry-leading technical support and can install the product to comply with our quality benchmarks.

Once an installer has been approved by Topseal, completed job maybe assessed by Topseal through follow-up courtesy customer satisfaction telephone calls and random surveys and inspections to ensure that our service meets your expectation



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.

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