What is GRP Roofing

GRP Roofing is the ultimate flat roofing system that can be used on a wide range of new build and refurbished roof designs.

GRP, short for ‘Glass Reinforced Plastic’ is a high-performance material made from specialised polyester resins and reinforced with fibreglass to create a strong but lightweight composite. This tried and tested process has been around since the early 1940s and in that time has been used to make everything from cars and aircraft to boats and wind turbines.

The GRP roofing system that we use today has been specifically engineered for use on flat roofing surfaces. The system has additional flexibility to cope with thermal expansion and contraction, fire retardancy certification to meet building regulations and inbuilt UV protection to handle solar degradation and maintain its high-quality finish.

The wide range of standard and custom finishes will ensure the surface of the roof not only looks good but blends into its surroundings, from traditional and modern architectural designs to listed heritage buildings.

With its strength, versatility and design flexibility, GRP roofing is a modern, cost-effective long-term solution to traditional flat roofing systems on the market today.

Guarantee Period

All GRP roofs installed by our approved contractors come with a 25 year guarantee.

Projected Lifespan

Providing there is no abnormal movement of the roof structure and the surface is subject to regular inspections and maintenance a GRP roofing surface will last over 30 years.


General performance properties for GRP roofing based on a standard installation.

Finishing Options
Environmental Performance

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How GRP Roofing Works

A GRP roof is built up from layers of high performance resins and fibreglass to give its unique strength and durability. Depending on the type of roof surface and the level of foot traffic the system can be adapted to increase strength and maximise performance.

A range of applications

One of the major advantages with GRP roofing is the product's versatility. It can be used on a number of different roofing surfaces and has the flexibility to work around any tricky obstacles.

Domestic Roofing

The system can be used on a number of different domestic 'cold' and 'warm' roof projects including home extensions, garages, dormer roofs, conservatories and orangeries along with parapet walls, gullies and gutters.

Balconies & Walkways

For applications that take foot traffic such as balconies, walkways and terraces we offer a dual layer of fibreglass reinforcement for added performance and protection. This system can also be fitting with a non-slip aggregated finish for extra safety.

Simulated Lead Roofing

GRP roofing is widely used as a lead and copper substitute on roofs, gutters and complex detailing on Churches and listed buildings throughout the UK. Lead rolls can be replicated by using special roofing profiles and the finish can be colour matched to provide a lead or copper green effect.

Green Roofing

GRP roofing is the perfect foundation for creating a bespoke green roof. Our living roofs offer a range of ecological and energy-saving benefits that can be planted with herbs, sedums or wildflowers that are native to your local area.

The Colours

Create a unique finish

GRP Roofing has a wide range of colours and finishes to choose from and can even be matched to a specific sample. For high foot traffic areas like balconies, special non-slip finishes are available that also come in a range of colours.

Buy Fibrelast Direct

Order the Fibrelast system for your next GRP flat roofing project today and we'll deliver it direct to site. Allbase supplies a complete range of trims, fibreglass and catalyst along with all associated tools and ancillaries. Browse our materials section for more details or talk through your project with a member of our team.

Get Fibrelast Installed

Get Fibrelast installed by one of our trained and approved professional GRP roofing contractors. All our installers have a minimum of 5 years experience in applying GRP roofing materials and have passed our own rigorous company checks. Request your free site survey and no-obligation quotation today.