GRP fibreglass flat roofing has become increasingly popular due to its durability, lightweight and low cost. This guide will provide an overview of how GRP fibreglass flat roofs should be maintained to maximise life expectancy.
Typical Lifespan Of GRP Fibreglass Roofs
The lifespan of a GRP fibreglass roof will depend on numerous factors, including the quality of installation, maintenance schedule, local climate, and amount of wear and tear it receives over time. Generally speaking, with proper care and maintenance, a GRP fibreglass flat roof should last between 20-30 years, possibly even 50 years. This is significantly longer than traditional felt roofs which typically need replacing after 10-15 years.
The material used in GRP fibreglass flat roofs makes them highly resistant to impacts from weathering elements like hail stones and UV radiation which can cause degradation over time. They also have high levels of fire resistance making them ideal for buildings situated close together or areas prone to severe weather conditions. They require little upkeep other than basic cleaning once or twice a year to keep them looking their best. With minimal effort, these roofs can remain protected against everyday environmental damage throughout their life cycle.
Maintaining A GRP Fibreglass Roof
Maintaining a GRP fibreglass roof requires regular checks and periodic repairs. It is therefore important to inspect the roof at least twice a year. During inspections, look for the following:
- Signs of damage or wear that could compromise the integrity of the roof
- Check for cracks in the material
- Check for any discolouration (this may be due to UV exposure or persistent water pooling)
- Changes in levels and movement
- Pin holes, bubbling or blistering
- Check around seams and joints to make sure they are secure and free from leakage.
For minor damage (and as a temporary measure), sealants can be applied to any cracks present. Make sure to use an appropriate sealant designed specifically for GRP roofs. GRP patch repairs should be considered for a long-term solution.
How To Clean A GRP Fibreglass Roof
Regular cleaning is essential for maintaining the roof. Debris such as leaves and dirt can accumulate on top of the surface over time, leading to water pooling and in turn, deterioration. Removing debris will also help improve visibility when inspecting the roof during routine maintenance checks.
Moss, algae and other organic matter can accumulate on the surface of a GRP fibreglass roof over time, which will reduce its performance levels and also create an unsightly appearance. To clean a GRP fibreglass roof, it is important to first identify what type of dirt has gathered on the surface; this will determine how best to approach cleaning the roof.
To begin with, moss or lichen growth should be removed from the surface using a stiff brush and warm water. For more stubborn areas, adding some detergent may help loosen up the material for easier removal. Depending on how much moss is present, a pressure washer may be necessary for effective cleaning. However, care must be taken when applying pressure as too much force could damage the fibreglass matting underneath the resin top coat layer.
For algal growths such as black spot mould or green algae typically found in coastal regions, either a chlorine based bleach solution or mild fungicide can be used to remove it from your GRP Fibreglass Roofing system. As with any chemical treatment , caution should always be exercised and safety gear worn if necessary - particularly eye protection since most chemicals are caustic and have potential health risks associated with them. With proper care and maintenance, you can ensure that your GRP Fibreglass Roof remains functional and aesthetically pleasing for many years to come.
Potential Defects That May Occur In Your GRP Fibreglass Roof
Delamination
The most common problem is delamination of the fibres, which can happen when water gets into the roof and causes it to rot or deteriorate. Delamination usually occurs at joints where two pieces of GRP have been joined together or in areas that have been exposed to weathering for a long period of time.
Cracking
Look for signs of cracking, which could either be due to excessive UV light exposure or expansion /contraction due to poor installation. Seal them temporarily if water ingress is an issue, with a view to a permanent patch repair.
Sagging
Look for any changes in levels where the roof might be sagging and allowing water to pool. Rectification would involve cutting out the timber boarding base and replacing on firrings to correct the level and then patch repairing the fibreglass.
Bubbling, blistering & pinholes
Look out for bubbles appearing under the membrane, blisters forming around edges and seams, and pinholes in the top surface. In most cases these are a consequence of poor installation and should be rectified with a patch repair.
How To Repair Any Defects In Your GRP Fibreglass Roof
If repairs are needed, our GRP fibreglass roofing kits are ideal as they contain everything required and can be purchased by size of repair required.
Please see our Fibreglass flat roof repair guide for more information on repairs.
