— Flat Roofing
Topseal GRP Flat Roofing
For domestic flat roofs the Topseal system is the ultimate choice in style and performance, with over 1,000 finish options and a 25-year guarantee. Topseal is cold-applied — no heat is required on site — making it a safe, eco-friendly, high-performance flat roofing solution.
— What's included
Specification & detail.
Topseal Approved Installer
25-year manufacturer-backed guarantee
Suited to extensions, garages, dormers, parapets, gutters, conservatories and orangeries
Cold-applied — no torch-on, no naked flame
Over 1,000 colour and finish options
— Project Enquiry
Planning a roofing project?
Whether you're a homeowner, contractor, architect, developer or property manager — Horizon can help you assess the right roofing route.