Top Seal Systems Ltd

Business Details

34 Years

experience

UK Leading GRP Roofing Specialists

Established in 1992, we are the UK's leading GRP roofing company with over three decades of expertise in advanced fibreglass roofing solutions. Our Top Seal Systems Ltd GRP systems have been installed across millions of square metres nationwide, combining cutting-edge technology with proven durability. Each roofing system is cold-applied on-site using specially formulated resins and heavyweight GRP edge trims, creating bespoke seamless solutions for domestic and commercial properties. Backed by BBA certification and guarantees up to 40 years, our nationwide network of trained installers ensures precision application and workmanship.

We maintain rigorous quality control through technical inspections and offer comprehensive support including CPD training, technical specifications, and environmental compliance. Our systems exceed industry standards for fire resistance (EXT.F.AA), UV protection, and chemical resistance while maintaining aesthetic versatility through 1,000+ colour options. With ISO 9001 and ISO 14001 accreditations, we combine innovation with sustainability in every project.

Services

GRP Roofing Commercial Roofing Domestic Roofing Green Roofs Water Containment

Details

Year established: 1992

Highlights and features

30 years' experience installing GRP systems across the UK
BBA-certified systems with up to 40-year guarantees
Cold-applied systems eliminating fire risk during installation
Nationwide network of approved, verified installers
ISO 9001 and ISO 14001 quality and environmental certifications

Associations and certifications

BBA
ISO 9001
ISO 14001

Website

Update Listing

Services

GRP Roofing

Our GRP roofing systems combine polyester resin with glass fibre reinforcement to create seamless, durable waterproof membranes. Cold-applied without heat, these systems cure within an hour and offer 25-40 year guarantees. Suitable for flat, pitched, and complex roof geometries on domestic and commercial properties while meeting Part L regulations.

Commercial Roofing

Heavy-duty roofing solutions for warehouses, factories, and office complexes featuring 600g/m reinforcement matting with anti-slip finishes. Systems withstand heavy foot traffic and environmental stressors while maintaining fire ratings to BS 476 Part 3. Available with 30-year guarantees for standard applications and 25 years for high-traffic areas.

Domestic Roofing

Tailored fibreglass roofing systems for residential properties including extensions, conservatories, and listed buildings. Available in standard Top Seal Systems Ltd (25-year guarantee) or HD (30-year guarantee) specifications with colour-matched finishes to BS4800/RAL standards. Seamless application prevents water ingress while maintaining aesthetic appeal.

Green Roofs

Complete green roofing systems incorporating sedum or wildflower vegetation layers over waterproof DoubleTop membranes. Provides thermal insulation, reduces urban runoff, and creates biodiverse spaces while maintaining 25-year watertight guarantees. Suitable for both new builds and refurbishment projects.

Water Containment

Double-layer waterproofing systems for critical applications like ponds, pools, and wet rooms. Features two 450g/m reinforcement layers with 25-year submerged water guarantee. Seamless application prevents leaks in complex geometries while maintaining chemical resistance for demanding environments.

Questions

What GRP roofing guarantees do you offer?

We provide 25-40 year guarantees depending on system choice, including 25 years for standard Top Seal Systems Ltd, 30 years for HD, and 40 years for DoubleTop systems.

Are your installers certified?

All installations are performed by trained, approved contractors with unique verification numbers to ensure quality and authenticity.

Can GRP roofs be installed on existing structures?

Yes, our systems can be applied to various substrates including concrete, timber, and existing bituminous membranes without requiring complete removal.

Do you offer different colours and finishes?

We provide over 1,000 colour options including simulated lead and copper finishes, with anti-slip aggregates available for high-traffic areas.

Are your systems environmentally friendly?

Our ISO 14001-certified processes feature cold-application with no toxic run-off, halogen-free formulations, and A+ ratings in the BRE Green Guide.

What fire safety ratings do you have?

Our systems achieve EXT.F.AA fire ratings to BS 476 Part 3, the highest classification for flat roofing materials.

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Reviews (2)

Write a Review

Pamela Osborne

Dec 11, 2019 Report

We used a Topseal approved installer for our garage roof but they used a gutter that was not Topseal approved. At one point they persuaded the installer to replace the gutter and "retrained" them. The installer later refused to do the replacement, so we can't get a Topseal guarantee. Topseal say they can't be responsible for their approved roofers work and can't take them off their approved list now, as they retrained them. Update after Response from the Owner: I wasn't aware of any solutions that were offered by Topseal to rectify this issue once the installer said they wouldn't replace the gutter, so I emailed them (just over a week ago) to ask what these solutions were.

They haven't replied. I left my review after it was clear the issue would not be resolved. Their implication that the reason this didn't happen was because I didn't wish to engage with them makes me even more dissatisfied.

Lml

Dec 06, 2019 Report

Had their fibreglass roof installed just few months ago. It's great quality and reasonable price. In fact it's cheaper than a couple of quotes from local traders we received because the individual builders would try to take advantage if they feel you don't have much knowledge about the roof system. I also received follow up phone calls from the head office to make sure their approved contractor has done everything right. Would use them again if we come across flat roof again.