Fibreglass (GRP) Roof Coating
No matter what style of roof you have the process is similar.
Fibreglass reinforced plastic (GRP) roofs are prized for their strength and seamless, moulded finish, making them a popular choice for flat roofs, balconies, and extensions. When properly maintained, GRP offers excellent waterproofing performance and a long service life.
The protective gel coat on top of the fibreglass eventually wears thin, though, and once that top layer degrades the roof becomes vulnerable to UV damage, fine surface cracking known as crazing, and, over time, water ingress through the laminate itself. Catching these early signs of wear before they progress is the key to protecting the structural integrity of the roof underneath.
Our Fibreglass (GRP) Roof Coating Process
Roof Inspection
We check the gel coat surface, edges, and upstands closely for crazing, soft spots, and blistering, as well as testing for any areas of flex that may indicate water has already reached the laminate below.
Cleaning and Preparation
The roof is cleaned and lightly abraded where needed to remove surface contamination and create the right profile for the new coating to bond to, since GRP’s smooth factory finish can otherwise resist adhesion.
Repairs
Any soft, delaminated, or damaged laminate areas identified during inspection are repaired first, ensuring the structural integrity of the roof before the coating is applied over the top.
Priming
A primer suited specifically to GRP surfaces is applied to the prepared roof, improving the bond between the fibreglass gel coat and the liquid membrane coating.
Membrane Coating Application
The liquid membrane coating is applied evenly across the roof, sealing crazing and restoring UV protection while preserving the smooth, seamless appearance GRP roofs are known for.
Signs Your Fibreglass (GRP) Roof Needs Attention
- Fine spider-web cracking, or crazing, across the gel coat
- Chalky, dull, or faded surface finish
- Small blisters or bubbles under the top layer
- Soft spots or flex underfoot in isolated areas
- Leaks appearing without any obvious puncture or damage
Why Choose Us for Fibreglass (GRP) Roof Coating
- Seals surface crazing and hairline cracks before they progress
- Renews UV protection to prevent further gel coat breakdown
- Maintains the smooth, seamless look GRP roofs are known for
- Protects the structural laminate from long-term water damage
- Simple, cost-effective maintenance compared to re-laminating
- Underlying damage repaired first for a durable, lasting finish
Advantages
Enhanced Durability
Our liquid membrane coating extends the lifespan of your roof by offering superior protection against the elements.
Aesthetic Appeal
Available in various colors, our coating enhances your roof's look while maintaining its protective qualities.
Cost-Effectiveness
Investing in our roof coating reduces the need for frequent repairs, saving you money in the long run.