Tracing water through a ceiling
Stains show where the water arrives, rarely where it starts.
In short: An investigation in Sydney's north followed water through a bedroom ceiling, mould on a staircase and damage in a downstairs bathroom.
Start with the pattern
Where staining appears, how far it spreads and whether it changes after rain all help separate a roof leak from a plumbing leak.
Look above the stain
Roof penetrations, box gutters and flashings directly above or upslope of the stain are the first suspects.
Readings across the area
A moisture meter maps the wet zone. A thermal camera can show where to take readings.
Mould as evidence
Mould on a ceiling or stair tells you moisture has been there for a while, not just after the last storm.
The report
It sets out the likely source, the evidence for it and what should be opened or repaired next.
Written by our local inspection team from work carried out in Castle Hill. Licensed building practitioners, NSW Fair Trading licence 366177C.
