What this means in practice
Flat-roof performance depends on the whole build-up: structural deck, vapour control, insulation, falls, waterproofing, outlets, kerbs and edge details. Choosing a branded membrane while ignoring trapped moisture or poor drainage simply locks the original fault beneath a new surface.
What to check next
- Design falls before setting door and outlet heights
- Allow for structural movement
- Check drainage across the completed surface
When should you ask a roofer to inspect it?
Arrange a survey for recurring leaks, soft or deflected decking, persistent ponding, split details, blistering or an unknown build-up. Openings may be needed before anyone can responsibly confirm whether an overlay is suitable or the roof must be stripped.
Safety first: do not climb onto a roof without suitable access, training and protection. Keep clear of loose coverings, unstable ceilings and water near electrical fittings.
Would you like a property-specific answer?
Request an inspection and written quotation from J&L Welch.
No deposit is required. Payment is due on completion within seven days, with the agreed scope and price confirmed in writing.