GRP Roofs Manchester
Seamless, joint-free GRP fibreglass flat roofing for extensions, garages and smaller flat roofs across Manchester.
The seamless flat roof solution.
GRP (Glass Reinforced Plastic) also known as fibreglass roofing creates a single, seamless membrane with no joints or welds. This makes it exceptionally watertight and ideal for extensions, garages and smaller flat roofs where a premium, long-lasting finish matters.
A properly installed GRP roof can last 25-30+ years with minimal maintenance.
Comparing flat roof systems? See how GRP compares to EPDM rubber and felt. Learn more.
Seamless means watertight
Because GRP is laid as a liquid that cures into a single continuous membrane, there are no joints, seams or welds to fail. This is what makes GRP one of the most reliably watertight flat roofing systems available.
Every GRP roof we install is built on a proper timber deck, with edge trims and a UV-resistant topcoat for long-term performance.
Why choose GRP?
Fully watertight
No joints means no weak points for water to penetrate.
UV resistant
The topcoat protects against sun damage and weathering.
Hard-wearing
Resistant to foot traffic, impact and temperature changes.
Seamless finish
A smooth, clean surface that looks premium.
Easy to repair
Localised damage can be patched without full replacement.
Low maintenance
Requires only occasional inspection and cleaning.
How a GRP roof is built
GRP installation process
Assessment
Inspect the deck and measure the roof area.
Preparation
Repair or replace decking, install edge trims.
Lamination
Apply resin, fibreglass mat and topcoat.
Completion
Cure, inspect and clean down the roof.
GRP roof installations
GRP installation
Manchester
Completed GRP roof
Trafford
Garage flat roof
Oldham
Got a leaking GRP roof?
We repair splits, impact damage and failed topcoats on existing GRP roofs across Manchester.
See Flat Roof RepairsFrequently asked questions
GRP is ideal for flat or low-pitch roofs on extensions, garages, dormers and bay windows. It is best suited to smaller areas. For larger flat roofs, EPDM rubber may be more appropriate.
A properly installed GRP roof typically lasts 25-30+ years. The seamless nature of the system means there are no joints to fail, which contributes to its longevity.
Yes. Localised damage to a GRP roof can be patched with new fibreglass and resin. This is one of the advantages of GRP repairs are straightforward without needing a full replacement.
GRP flat roofs are finished with a topcoat that is available in various colours, including grey, dark grey and green. The most common choice is a neutral grey that complements most properties.
Interested in a GRP flat roof?
Get a free quote from our Manchester flat roofing team.