How Roofers Actually Find a Hidden Leak (Video Techniques Explained)
BERKELEY FLAT ROOF BLOG
How Roofers Actually Find a Hidden Leak
A few of the real techniques professionals use, beyond just looking at the stain and guessing.
Interior-to-roof measurement: measuring the water stain’s distance from two fixed walls, then replicating those same measurements on the roof to get a starting search point. Grid search: on a heavily patched roof, dividing the suspect area into sections and checking each systematically.
Transition-first inspection: checking flashing, parapets, and penetrations before assuming the open membrane is the problem, since that’s where most leaks actually originate. None of these require special equipment — just a methodical process instead of a guess.
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