Flat Roof Leak After a Roof Cleaning Service — What Happened?
BERKELEY FLAT ROOF BLOG
Flat Roof Leak After a Roof Cleaning Service — What Happened?
Pressure washing and aggressive cleaning can genuinely damage an older or already-marginal membrane.
High-pressure cleaning can strip protective granules, force water under lapped seams, or stress an already-brittle membrane past its breaking point — especially on older modified bitumen or built-up roofs. A leak that shows up shortly after a cleaning service isn’t necessarily a coincidence.
If this happened to you, it’s worth having the roof inspected specifically with that timeline in mind — knowing when and how the damage likely occurred helps pinpoint where to look.
Leak started after a cleaning or pressure washing?
