GRP Fibreglass Roofing: Benefits, Installation, UK Cost, and More

GRP (Glass Reinforced Plastic) fibreglass roofing is a type of roofing material made from a composite of glass fibre, resin, and other additives. The process of creating GRP fibreglass roofing involves layering these materials onto a mould or surface, then allowing them to cure and harden, resulting in a durable and waterproof roofing material.

The components of GRP fibreglass roofing include:

1. Glass Fibre Mat: Glass fibre matting serves as the structural component of GRP roofing. It provides strength and rigidity to the material, helping it withstand various weather conditions and loads.

2. Resin: Resin acts as the bonding agent in GRP fibreglass roofing. Typically, polyester resin is used, although epoxy resin can also be employed for specific applications. The resin binds the glass fibres together, forming a solid and cohesive material.

3. Catalyst: A catalyst is added to the resin to initiate the curing process. The catalyst triggers a chemical reaction that causes the resin to harden and form a solid matrix, effectively turning the liquid resin into a solid material.

4. Pigments: Pigments can be added to the resin to provide colour to the finished product. This allows for customisation and aesthetic enhancement of the roofing material, enabling it to blend seamlessly with the surrounding architecture.

5. Fillers and Additives: Fillers and additives may be incorporated into the resin mixture to modify certain properties of the GRP roofing, such as fire resistance, UV stability, or flexibility.

Benefits of GRP Fibreglass Roofing

GRP fibreglass roofing offers a multitude of benefits that make it an attractive choice for a wide range of roofing applications. Here are some benefits:

• Durability: GRP fibreglass roofing is highly durable and long-lasting. It can withstand extreme weather conditions, including heavy rain, snow, hail, and high winds, without deteriorating or losing its structural integrity.

This durability ensures that the roof remains intact and provides reliable protection for many years.

• Waterproof: One of the primary advantages of GRP fibreglass roofing is its excellent waterproofing properties. The seamless construction of GRP roofing eliminates the risk of leaks and water ingress, providing a watertight barrier that effectively prevents moisture from penetrating into the building structure.

This feature is particularly beneficial for flat roofs and areas prone to heavy rainfall.

• Chemical Resistance: GRP fibreglass roofing is resistant to a wide range of chemicals, including acids, alkalis, and solvents. This makes it suitable for use in industrial environments, where exposure to corrosive substances is common.

Additionally, the chemical resistance of GRP roofing ensures that it remains unaffected by pollutants and atmospheric contaminants, maintaining its appearance and performance over time.

• Lightweight: Despite its strength and durability, GRP fibreglass roofing is lightweight compared to traditional roofing materials such as concrete or clay tiles. This lightweight nature makes it easier to handle and install, reducing labour costs and construction time.

It also puts less structural strain on the building, allowing for greater design flexibility and potential cost savings.

• Flexibility: GRP fibreglass roofing is inherently flexible, allowing it to be moulded into various shapes and contours to suit the specific requirements of different roof designs. This flexibility enables architects and builders to create customised roofing solutions that seamlessly integrate with the overall aesthetics of the building.

Additionally, GRP roofing can be easily adapted to accommodate roof lights, vents, and other fixtures without compromising its waterproofing capabilities.

• Low Maintenance: GRP fibreglass roofing requires minimal maintenance to keep it in optimal condition. Unlike traditional roofing materials that may require regular inspections, cleaning, and repairs, GRP roofing is relatively low maintenance.

Occasional cleaning with soap and water is typically sufficient to remove dirt and debris and maintain its appearance. This reduces ongoing maintenance costs and hassle for property owners.

• Fire Resistance: GRP fibreglass roofing offers excellent fire resistance properties, making it a safer choice for buildings where fire protection is a priority. GRP roofing materials are inherently non-combustible and do not contribute to the spread of flames in the event of a fire.

This can help to prevent the rapid spread of fire and minimise damage to the building and its contents, enhancing overall safety and peace of mind.

• Energy Efficiency: GRP fibreglass roofing can contribute to improved energy efficiency in buildings. By providing effective insulation and thermal performance, GRP roofing helps to regulate indoor temperatures and reduce heating and cooling costs.

This can lead to significant energy savings over time and contribute to a more comfortable and sustainable living or working environment.

Comparing GRP Fibreglass Roofing to Other Materials

grp fibreglass roofing cost in the UK

According to estimates from roofing professionals and industry sources, the average cost of installing GRP fiberglass roofing in the UK ranges from £80 to £120 per square metre. However, this cost can increase for more complex installations or if additional services such as insulation or rooflights are required.

It’s advisable to obtain quotes from multiple roofing contractors to compare prices and ensure that the chosen contractor is reputable and experienced in GRP roofing installation.

how long does a grp roof last?

GRP roofs typically have a lifespan of around 30 to 35 years when properly installed and maintained. However, factors such as exposure to harsh weather conditions, UV radiation, and the quality of installation can affect the longevity of the roof. Regular inspections and maintenance can help extend its lifespan.

Grp fibreglass roofing installation

The installation process of GRP fibreglass roofing involves several steps to ensure a proper and durable application.

1. Surface Preparation

   • The surface where the GRP roofing will be applied needs to be thoroughly cleaned and prepared. Any debris, dirt, or existing roofing material must be removed to create a clean and smooth substrate.
   • Any defects or irregularities in the surface should be addressed and repaired to ensure a uniform base for the GRP roofing.

2. Trimming and Cutting

   • GRP roofing sheets or rolls are trimmed and cut to the required size and shape to fit the dimensions of the roof accurately. Careful measurements and cutting are essential to ensure a proper fit and minimise wastage.

3. Application of Resin

   • A layer of resin is applied to the prepared surface using a brush or roller. The resin serves as the bonding agent for the fibreglass matting and provides the waterproofing properties of the roofing system.
   • It’s crucial to ensure even coverage and saturation of the surface with resin to achieve a strong and durable bond.

4. Laying of Glass Fibre Matting

   • Glass fibre matting is carefully laid onto the resin-coated surface, starting from one end and working towards the other.
   • The matting is pressed firmly into the resin to ensure proper adhesion and eliminate air pockets or bubbles that could weaken the roofing system.

5. Application of Additional Resin

   • Another layer of resin is applied over the glass fibre matting to fully saturate it and create a seamless and waterproof membrane.
   • The resin is worked into the matting using a brush or roller, ensuring complete coverage and consolidation of the layers.

6. Curing Process

   • Once the resin has been applied, a catalyst is added to initiate the curing process. The curing time may vary depending on factors such as temperature and humidity, but typically takes a few hours to complete.
   • It’s essential to allow sufficient time for the resin to cure and harden fully before proceeding with any further work or loading on the roof.

7. Trimming and Finishing

   • After the GRP roofing has fully cured, any excess material or rough edges are trimmed and smoothed out to achieve a clean and uniform finish.
   • Optional surface treatments, such as gel coating or painting, may also be applied for added protection and aesthetic appeal.

8. Quality Check

   • A thorough inspection of the completed GRP roofing is conducted to ensure that it meets the required standards of quality and performance.
   • Any defects or imperfections are addressed and rectified to ensure the integrity and durability of the roofing system.