Revisions log for Answer #982
This is the answer to the question What grout should I use to install tiles in a bathroom in a sip panel house?
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2022‑07‑04 11:57
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The glue you have chosen is good. The grout does not necessarily have to be epoxy, you can add a latex plasticizer to the cement grout instead of water.
The gypsum fiber sheet is better to lay in two layers. But judging by the fact that you have made a framework of the profile, it means that the main wall is not framed, so perhaps one layer may be enough, but not 10 mm, at least 12 mm.
And I would still recommend 2 layers.