GRP Fibreglass Roofing
GRP Fibreglass Roofing in London
GRP fibreglass roofing creates a seamless, tough, waterproof surface that follows the shape of the roof. It is one of the most popular flat roof systems in London for good reason.
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GRP Fibreglass Roofing across London
GRP stands for glass-reinforced polyester. A layer of resin and glass-fibre matting is laid on a prepared deck and finished with a pigmented topcoat. It cures quickly into a rigid shell with no seams or joints for water to find.
It suits roofs of nearly any shape, including dormers, bay windows, balconies, garages and extensions, and it handles foot traffic well. We fit GRP with proper edge trims, drip details and upstands so the roof looks neat and stays watertight.
Why choose GRP
- Seamless surface with no laps or joins to fail
- Strong and impact resistant, good for roofs you will walk on
- Quick to install and fully cured within a short time
- Suits small, awkward and complex shapes
- Long expected life when installed on a sound deck
Not sure what is wrong?
Send us a photo or describe the problem and we will tell you honestly what we think it is and what it needs. A free written quote follows any inspection.
How a GRP roof is installed
We prepare a sound, dry timber deck, usually plywood or OSB, fit trims, apply the resin and glass-fibre layers and finish with a topcoat in your choice of colour. Good installation depends on temperature and dry weather, because moisture in the deck or damp conditions can affect adhesion.
We can lay GRP over a new deck as part of a replacement, or over a new warm roof build-up with insulation beneath. If you need a roof you can use regularly, we offer a non-slip finish.
How it works
Prepare the deck
We make sure the deck is sound, dry and laid to falls.
Fit trims
Drip, edge and upstand trims are installed before lamination.
Laminate
Resin and glass-fibre layers form a continuous membrane.
Top coat
Pigmented topcoat gives colour, UV protection and a smooth finish.
Roof leaking now?
We offer emergency call-outs across all London boroughs. Call us and we will tell you what to do straight away and how soon we can attend.
GRP compared with EPDM and felt
GRP is rigid, so it needs a firm deck and can crack where a building moves a lot. EPDM is flexible and suits large simple roofs. Felt is cheaper but typically has a shorter life. See flat roofing for a full comparison.
What affects the cost?
GRP roof cost depends on area, shape, deck condition and the finish. Small roofs cost more per square metre than large ones. We quote after a free survey.
GRP Fibreglass Roofing in your part of London
We carry out grp fibreglass roofing across every London borough and the areas around it. Choose your borough to see how we work locally, or call us on 020 7946 0958 if yours is not listed.
Related roofing services
Flat Roofing
New flat roofs, repairs and replacements in GRP, EPDM and felt for extensions, garages and dormers.
Flat Roof Replacement
Stripped back and rebuilt: new decks, falls, insulation and a durable GRP, EPDM or felt finish.
EPDM Rubber Roofing
Durable, flexible single-sheet rubber roofing for extensions, garages and larger flat roofs.
Dormer Roofs
Roofing and repairs for dormers and loft conversions in GRP, lead, tile and slate.
GRP Fibreglass Roofing FAQs
How long does a GRP roof last?
Installed well on a good deck, a GRP roof can last 25 years or more, longer with regular cleaning and checks.
Can GRP be fitted over my existing roof?
Usually the old covering is removed and the deck checked first. We assess whether the existing deck is suitable.
What colours are available?
Common finishes are grey and black, with other colours available. We will show you options.
Does GRP crack?
It can if the deck moves or is poorly prepared. That is why correct deck preparation and good trims matter.
Free written quotes
Need grp fibreglass roofing in London?
Call us or send your details for a free written quote.
Free quotes
Get your free written quote
Tell us about your roof and we will come back to you with advice and a clear written quote. No pressure and no obligation.
- Free written quotes, no obligation
- TrustMark registered and fully insured
- Emergency call-outs across London
- Prefer to talk? Call 020 7946 0958
Call us on 020 7946 0958 or email [email protected].