GRP Fibreglass Flat Roofing in Chelsea

Chelsea’s Georgian and Victorian terraces, mansion blocks and mews houses have some of the most detailed roofs in London, with mansards, lead flats, parapets and ornate chimney stacks. Most of the area falls within conservation areas, so repairs are carried out with matching slate and traditional leadwork.

Glass reinforced plastic, known as GRP or fibreglass, combines polyester resin with chopped glass fibres to create a strong, waterproof laminate. Originally popular in boat building for its strength and resistance to corrosion, it has become a leading choice for flat roofs.

A typical GRP roof we install has an 18mm OSB3 deck, a single-ply fibreglass laminate, GRP edge trims and a durable topcoat. Finished this way, the roof is lightweight and seamless, copes well with hot and cold weather, and can last more than 20 years.

Most GRP roofs are finished in grey, but other topcoat colours are available if you want the roof to match your property. For a free GRP roofing quote in Chelsea, call 07467 757 367.

GRP fibreglass roofs in Chelsea
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Why Chelsea Properties Need the Right GRP Fibreglass Roofs

Lead and traditional coverings dominate the period rooftops of Chelsea, but GRP fibreglass still has a place on smaller flat areas such as rear extensions, dormers, garages in mews, porches and balconies, particularly where these are out of sight.

We lay a single-ply GRP laminate on an 18mm OSB3 deck, finished with GRP edge trims and a topcoat. It forms a seamless surface with no joints, and a well-installed GRP roof can last 20 years or more. Grey is standard, and other colours are available. On listed buildings or in conservation areas, a modern material may not always be appropriate, so it is worth checking with the Royal Borough before choosing GRP for a visible roof. We can advise on whether GRP or a traditional option suits each roof. We also install GRP for homes in Battersea and South Kensington.

Our Staines head office is about 15 miles from Chelsea, and we regularly work on homes and businesses across the area. Like-for-like roof work does not usually need planning permission, but if your property is listed or in a conservation area it is worth checking with the Royal Borough of Kensington and Chelsea before work starts, and we are happy to talk this through with you.

Where We Fit GRP Roofs in Chelsea

Garages and Outbuildings

Replace tired felt on garages, sheds and outbuildings with a GRP roof that needs very little maintenance.

Flat Roof Replacement

We strip old felt or failed coverings, renew the deck where needed and lay a new GRP roof.

Balconies and Roof Terraces

With the right deck and topcoat, GRP can create a hard-wearing waterproof surface for balconies and terraces.

Dormer Roofs

GRP is lightweight and easy to form around upstands, making it well suited to dormer roofs on loft conversions.

Extension Roofs

Kitchen, rear and side extensions with flat roofs are ideal for GRP, giving a neat, seamless finish.

Porches and Bay Roofs

Small flat roofs over porches and bay windows can be finished in GRP with matching edge trims.

Common Questions About GRP Fibreglass Roofs in Chelsea

Can I use GRP on a hidden flat roof in Chelsea?

On roofs out of public view, GRP is often a practical choice, giving a seamless finish that can last 20 years or more. On listed buildings or visible roofs in conservation areas, consent may be needed, so it is worth checking with the Royal Borough first.

What is a GRP fibreglass roof?

GRP stands for glass reinforced plastic. Resin and glass fibre matting are laid over a timber deck to form a single seamless, waterproof layer, finished with edge trims and a topcoat.

How much does a GRP roof cost?

It depends on the size of the roof, the condition of the deck and access. We will look at the roof and give you a free, no-obligation quote.

How long does a GRP roof last?

A properly installed GRP roof can last for over 20 years and shows very little sign of wear in that time.

Can GRP be laid over my existing flat roof?

Usually we strip the old covering and check the deck. If the deck is damaged or not suitable, we replace it with new OSB3 boards before laying the GRP.

Is GRP better than felt for flat roofs in Chelsea?

GRP is seamless, so there are no joins for water to get through, and it does not need the regular maintenance that older felt roofs do. It is a popular upgrade when a felt roof fails.

Get a GRP Roofing Quote in Chelsea

Thinking about replacing a flat roof? Talk to us about GRP fibreglass and get a free, no-obligation quote.

Call 07467 757 367 or email info@highlineroofing.co.uk

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