At London Fibreglass Co, we install and repair fibreglass roof valleys that offer unmatched waterproofing and long-term durability. Roof valleys are critical junctions where water runoff converges, making them especially prone to leaks and deterioration. Our GRP (Glass Reinforced Plastic) solutions provide a seamless, weather-resistant finish that stands the test of time.
Roof valleys are the internal angles formed where two roof slopes meet. These channels direct rainwater down to your gutters. Because of their positioning, they face heavy water flow and are often the first point of failure if not properly sealed or maintained.
Completely Seamless – Eliminates joints and weak spots where leaks typically occur
Long-Lasting – GRP offers a lifespan of over 25 years with minimal maintenance
Highly Waterproof – Perfectly suited to withstand constant water exposure
Versatile – Easily moulded on-site to fit traditional or complex roof designs
Resistant to Weather & Debris – Will not crack, rust, or degrade over time
New Roof Valley Installations
We fit GRP valleys on both pitched and flat roofing systems as part of new builds or roof replacements.
Valley Repairs & Replacements
We remove failed lead, felt, or metal valleys and replace them with high-performance fibreglass systems.
Overlay Solutions for Existing Valleys
Where appropriate, we can apply a fibreglass overlay to enhance waterproofing and extend lifespan.
Custom Valley Moulding
Our team can fabricate bespoke fibreglass valleys on-site, ensuring a precise fit for complex or unusual roof structures.
Our team are specialists in fibreglass flat roofs, valleys, ponds, and industrial sheeting, bringing years of hands-on experience and precision craftsmanship.
We offer honest advice and transparent, no-obligation quotes for all projects—big or small.
From box gutters and roof overlays to industrial roof repairs, we deliver end-to-end fibreglass solutions tailored to every project.
Our fully trained team works to the highest standards, using premium materials to ensure long-lasting, watertight finishes on every job.
We proudly serve Greater London and surrounding areas with prompt, reliable service and industry-leading expertise.
We treat every property with care—keeping disruption to a minimum and always cleaning up thoroughly after every job.
Greater London & Surrounding Areas
