#53546
Austman
Flatchatter

    How do I make sure that the issue was due to a non-compliant or failed waterproofing requirement or standard that applied when the laundry was built or renovated?

    You need to consult a qualified waterproofer/plumber.

    But AFAIK in 1997, laundry floors in class 2 buildings (apartments) that were located above another sole-occupancy unit needed to be both waterproofed and have a floor waste.

    If that’s where the leaking actually occurred, it was probably non-compliant.