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Flat grey roof on a modern brick house with a drainage system, surrounded by greenery and rooftops in the distance.

Weather-tight fibreglass roofing for flat roofs in London

Reinforced resin build-up. Hard finished surface. Domestic and commercial applications considered.

A hard finish formed as one system

Prepare a stable base

We check the deck before applying resin over movement or hidden deterioration.

Reinforce complex details

Corners and upstands are formed carefully within the fibreglass build-up.

Finish the surface cleanly

A protective top layer completes the hard, weather-resistant roof surface.

Form a tough surface over a prepared deck

Fibreglass roofing, also known as GRP, is built directly onto a suitable flat-roof deck. Reinforcement and resin combine to form a hard, weather-resistant surface, followed by a protective finish. Because the system cures in place, preparation matters. We check that the deck is stable and suitable before forming the waterproof build-up. A sound installation creates a clean finish for appropriate home and commercial roofs, without relying on loose sheets across the main area.

A grey flat roof extension with a smooth finish on a brick building.
Flat grey roof on a modern brick house with a drainage system, surrounded by greenery and rooftops in the distance.

Detail corners and outlets before they cause trouble

The broad surface may look simple, but edges, corners, outlets and upstands demand accurate work. We form these points as part of the reinforced system and seal around penetrations to preserve one continuous barrier. Roof layout, drainage and access all affect whether GRP is the right choice, as does the condition of the existing deck. We assess those points before recommending it. Where suitable, the result is a robust flat-roof finish designed to take ordinary weather exposure and direct rain towards the intended outlets.

Frequently asked questions

How is a GRP flat roof constructed?

We prepare a suitable deck, form the reinforced resin layer and apply the protective finished surface. Edges, outlets and upstands are built into the system. The exact specification depends on the roof layout and deck condition.

Can GRP be installed on every flat roof?

No single system suits every roof. GRP needs an appropriate, stable deck and workable conditions for installation. We also consider drainage, access, shape and perimeter details before confirming that fibreglass is a sensible option.

What finish does fibreglass roofing provide?

GRP creates a hard, clean surface rather than a flexible sheet finish. Its final appearance depends on the selected system and detailing. We explain the available specification and how it will meet edges, outlets and other roof features.

Check if GRP fits your roof layout

Call us to arrange an assessment and free quotation for a properly prepared fibreglass roof.

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