Fibreglass (GRP) Roofs
Seamless GRP fibreglass flat roofs with no joins or seams to fail, smart, tough and long-lasting.
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One seamless surface, nowhere for water to get in
Fibreglass, or GRP, creates a single, seamless waterproof layer moulded to the exact shape of your roof. With no joints or seams, there's simply nowhere for water to find a way through.
It's an excellent choice for balconies, dormers and flat roofs where a hard-wearing, good-looking finish matters. Roofcraft lays GRP with a professional topcoat for a durable, attractive result.
- Seamless, jointless finish
- Hard-wearing topcoat
- Ideal for balconies
- Choice of colours
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The benefits of a GRP roof
No seams to fail
A single moulded layer means no joints, laps or welds where leaks usually start.
25+ year lifespan
GRP is extremely durable and can last well over two decades with minimal upkeep.
Walk-on strength
Tough enough for balconies and roof terraces, not just out-of-sight flat roofs.
Attractive finish
A smart, professional topcoat available in a range of colours.
Low maintenance
Once it's down, a fibreglass roof needs very little looking after.
Guaranteed work
Fully insured and backed by our workmanship guarantee.
A finish that's only as good as the fitter
GRP has to be laid in the right conditions by someone who knows the material, get the mix, temperature or prep wrong and it won't perform.
Our roofers install fibreglass properly, with a sound deck, neat trims and a fully cured, even topcoat that looks as good as it lasts.
- Correct deck & prep
- Even, cured topcoat
- Neat GRP trims
- Free inspection
What our customers say
Frequently asked questions
Can I walk on a fibreglass roof?
Yes, GRP is strong enough for foot traffic, which makes it a great choice for balconies and roof terraces as well as standard flat roofs.
Will a GRP roof crack in cold weather?
When installed correctly on a stable, well-built deck, a quality GRP roof resists cracking. Proper preparation and the right conditions during installation are key.
How long does a fibreglass roof last?
A correctly installed GRP roof typically lasts 25 to 30 years or more with virtually no maintenance.
Can fibreglass be laid in any weather?
No, GRP needs dry conditions and a minimum temperature to cure properly, so we plan the work around the weather. Getting that right is exactly what gives it its long, trouble-free life.
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- Fast response, usually the same working day
- Free, no-obligation roof inspection
- Covering Hertfordshire & the surrounding area