Water ingress at a rear bathroom bay window in new frame
Water getting into a new bathroom needs checking before tiling is completed.
Greenbank 4124 · 15 April 2026
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Queensland Building & Construction Commission -
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In short: Water found at the sill of a rear bathroom window during a Greenbank handover.
What water ingress looks like
Visible water marks, stains or dampness on the plaster or timber frame near the window sill.
Property site locations
On a handover in New Beith, at the rear bathroom bay window where the frame meets the slab.
Possible causes
Poor flashing details, a gap in the sealant, or water running off the roof and pooling at the bay. The design must be checked.
Why your inspection finds defects
Looking at the drainage path, checking the flashing type and placement, measuring the sill level, and observing water flow during rain.
Your next steps
Cleaning out the channel, reapplying sealant if the joint is sound, or changing the flashing if it is blocked.
Written by our local inspection team from work carried out in Greenbank. Licensed building practitioners.
