GRP / Fibreglass Roof Replacement
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GRP Fibreglass Roofing Leeds — Seamless Flat Roofs with 25-Year Guarantees
GRP fibreglass roofing is the benchmark for long-life, seamless flat roofing. ProMax Roofing & Building installs GRP fibreglass systems across Leeds, West Yorkshire and surrounding areas — delivering roofs with 25-year guarantees and zero maintenance requirements. Director Lee personally oversee every GRP installation. No subcontractors. Fully insured. Call 07347 627044 for your free flat roof survey.
Why Choose GRP Fibreglass Roofing?
GRP (Glass Reinforced Polyester) fibreglass roofing has become the preferred flat roofing system for homeowners across Leeds and West Yorkshire — and for good reason. A correctly installed GRP roof is seamless, meaning there are no joints or laps where water can penetrate. It is rigid, highly resistant to foot traffic, and bonds permanently to the roof deck.
Unlike traditional felt systems, which typically last 10–15 years before showing wear, a quality GRP fibreglass system carries a 25-year guarantee when installed by a certified contractor. The material is chemically inert — it does not rot, blister, or degrade in UV. Maintenance requirements are minimal: an annual visual check and occasional re-gel-coat after 15–20 years is all that is required in most cases.
GRP is ideal for: flat roofs on extensions, garages, bay windows, and porches across Leeds and West Yorkshire. It can be installed over new OSB decking or directly over existing sound substrates in some cases. With 15 years of experience, Lee will survey your existing roof and recommend the right system and specification for your property.
How We Install GRP Fibreglass Roofing
Every GRP fibreglass roof installation in Leeds follows a strict process to ensure a fully bonded, watertight finish with no weak points.
The existing roof covering is stripped down to the deck. We inspect and replace any soft or water-damaged decking boards before laying new 18mm OSB3. Falls boards are installed where the existing deck is flat — GRP requires a minimum 1:80 fall to prevent ponding. Drip trims are fitted at all perimeter edges.
The GRP laminate is mixed and applied in one continuous operation — no joints, no overlaps. A top coat and anti-slip aggregate are applied while still wet, bonding permanently with the laminate below. On completion, we run a full inspection and issue a 25-year guarantee certificate.
Most GRP installations in Leeds are completed in one day. The surface is walkable within 24 hours and fully cured within 72 hours. We also offer felt roof replacement and EPDM rubber roofing as alternatives — ask us to compare all three for your project. Serving Leeds, Bradford, Wakefield, Harrogate, and Huddersfield.
Why Choose ProMax for Your Roof Replacement?
ProMax Roofing & Building is a Leeds-based roofing contractor with over 15 years of experience across West Yorkshire. Every job is director Lee will be on site throughout your project, not just at the sales stage. We use no subcontractors, so the team that quotes the job is the team that does the work. We are fully insured and provide written guarantees on all replacement work. Our prices are transparent and competitive, and we do not use pressure selling. Call 07347 627044 or use the form below for a free, no-obligation roof survey.