CrownPeak RoofingFlat Roof Services in Windsor
EPDM & GRP Flat Roof Specialists in Windsor, Berkshire
Flat roof services in Windsor typically cost between £1,500–£3,200 depending on the system and area. CrownPeak Roofing installs and repairs EPDM rubber membrane and GRP fibreglass flat roofs across Windsor. Whether you need a new flat roof on a garage, extension, or dormer, or your existing felt roof is failing, we provide long-lasting solutions with manufacturer-backed guarantees of up to 20 years.
Flat Roof Solutions for Windsor Properties
Many Windsor homes have flat-roofed extensions, garages, dormers, or bay window canopies. Older properties often have traditional felt flat roofs that last just 10–15 years before cracking and leaking. Modern EPDM and GRP systems last 30–50+ years with virtually zero maintenance.
Windsor's proximity to the Castle and Thames means many properties are in conservation zones or flood-risk areas. Period slate and clay tile roofs dominate the town centre, while newer estates use modern concrete tiles. The high property values — averaging over £565,000 — mean homeowners invest in quality roofing to protect their asset. EPDM rubber membrane is ideal for most residential flat roofs — it's flexible, UV-resistant, and handles thermal movement without cracking. GRP fibreglass provides a seamless, rigid surface that's perfect for walkable areas like balconies and roof terraces.
Services We Provide
- EPDM rubber membrane installation (Firestone/ClassicBond)
- GRP fibreglass flat roof installation
- Felt flat roof replacement and upgrade
- Flat roof leak repair and patch work
- Flat roof insulation (warm deck systems)
- Parapet wall and upstand flashing
- Flat roof drainage improvement
- Flat-to-pitched roof conversion
Why Choose CrownPeak in Windsor
- EPDM and GRP certified installers
- Manufacturer-backed 20-year guarantees
- Warm deck insulation for energy efficiency
- All Windsor postcodes covered
- Free survey and detailed quotation
- Workmanship guarantee on all installations
Signs Your Windsor Flat Roof Needs Attention
Flat roof problems often start with ponding water that doesn't drain properly. Look for bubbling, cracking, or splits in the surface material. Inside, check for damp patches on ceilings below the flat roof — especially in corners and around light fittings.
If your Windsor property has a felt flat roof that's more than 10 years old, it's approaching the end of its useful life. An upgrade to EPDM or GRP now prevents water damage to the room below and saves on repeated repair costs.
Need a Flat Roof in Windsor?
Call for a free survey — we'll recommend the best system for your property.
Flat Roof Services in Windsor — Your Questions Answered
Every project is unique, so we provide tailored quotations after a free survey. Contact us for a no-obligation estimate.
EPDM is better for most residential flat roofs — it's flexible, durable, and costs less. GRP is ideal for walkable areas like balconies or roof terraces where you need a solid, seamless surface. We advise based on your specific needs.
EPDM rubber roofs last 50+ years. GRP fibreglass lasts 30-40 years. Traditional felt lasts just 10-15 years. We only install EPDM and GRP for long-term performance.
Yes, we repair all types of flat roofs. However, if your felt roof is over 10 years old and leaking in multiple places, replacement with EPDM or GRP is usually more cost-effective than repeated repairs.
We strongly recommend warm deck insulation for all flat roof installations. It prevents condensation, improves energy efficiency, and meets Building Regulations. The insulation cost is minimal compared to the energy savings.
Verified Reviews
“They fitted a new flat roof on our bay window. The detailing around the edges is really neat — clear attention to quality.”
“CrownPeak replaced our old felt flat roof with a modern fibreglass system. No more puddles forming — the drainage is spot on now.”
“Professional flat roof team. They explained the difference between felt, EPDM, and GRP, and helped us pick the right option. No hard sell.”
Areas We Cover in Windsor
We serve every neighbourhood across Windsor and surrounding areas. No matter where you are in the SL4 postcode areas, our local team can reach you quickly.