GRP roofing: what to ask before specifying it

This is general information, not a survey, design, legal or Building Control decision. The correct scope and standard depend on the property, work, date and regulatory route.

GRP systems are multi-layer waterproofing systems, not simply paint. The deck, falls, trims, outlets, temperature, preparation and compatible materials all affect the result.

Use the selected manufacturer's current system guide and installer requirements. A site assessment is needed for leaks, ponding, damaged deck or unclear roof build-up.