Rooflight Repair – GRP Rooflights

Problem: Surface Worn GRP

Surface Worn GRPProfiled translucent GRP rooflights are designed to provide diffused natural daylight with obvious benefits for commercial offices and buildings and are manufactured to meet stringent non fragile and fire retardant regulations.

The external weather surface is commonly protected with a UV resistant polyester film. Long term, it’s this film or gel coat and not the sheet itself that usually needs replacing. Caught in time, a rooflight can often be treated in situ and its protection preserved.


Treatment: Delglaze

Delglaze is a high performance, high build, single component moisture curing aliphatic polyurethane coating that cures to provide a clear, tough membrane principally for the re coating and sealing of aged and weathered GRP rooflights.
Delglaze Treated Surface

  • It is UV resistant and accommodates rooflight movement.
  • Primer-less adhesion to cleaned GRP surfaces.
  • Fast application without disruption to internal activities

Once clean of moss and lichen, Delglaze seals in the exposed fibres, remaining flexible enough to accommodate rooflight movement. Fully cured Delglaze provides a tough clear elastomeric coating with crack bridging capabilities that is particularly effective on difficult to replace rooflights on asbestos and fibre cement roofing. Delglaze is based on a unique blend of polyurethane resins to produce a coating, which provides a tough durable finish with a high degree of impact, erosion and weather resistant properties. Delglaze is simple and easy to use straight from the can by roller or brush application.

Read more about Delglaze ®