25/10/2026
It’s frustrating how little control we have over what happens to our waterproofing once we leave a job.
This week, a tiler removed a vertical wall angle because he believed it didn’t need to be there. His reasoning? “I’ve been waterproofing for years, and we’ve never done that.”
Those angles serve a purpose. They’re part of a system designed to contain water and prevent it from escaping the bathroom and damaging surrounding areas.
On the same job, the doorway angle was also removed because it didn’t suit the floor tiles they’d laid. The plan was to stick down another angle that suited—but what about connecting it properly to the waterproofing?
Waterproofing isn’t something you can cut out, move or replace without understanding how it affects the whole system. Just because you’ve always done something a certain way doesn’t mean it’s right.
Tiling is a skilled trade and a big enough job on its own. Please respect the waterproofing, and speak to the waterproofer before altering it.
Those details are there for a reason. Understanding AS 3740 and the waterproofing system matters.
