ᐅ Installing Screed Under a Bathtub

Created on: 29 Apr 2026 13:30
E
erwind2
Hello,

There is currently a classic corner bathtub in the bathroom, tiled on two sides and positioned against two walls. There is no screed underneath the bathtub.
Since the tub is made of acrylic, I would like to replace it with a steel enamel bathtub. There are now bathtubs on the market that are already panelled on two sides:


The problem is that these bathtubs are meant to be installed on screed or tiles. How should I fill the gap under the bathtub so that it can be tiled afterwards?
E
erwind2
2 May 2026 00:12
Which type of stones do you recommend to support the bathtub? How do I secure the stones to the subfloor?

How did you fill the 1 sqm (10.8 sq ft) area?