According to our architect, we only have to do horizontal floor slab waterproofing in the house.
We have already done this in the house on the first floor.
However, I'm wondering if we shouldn't also do it on the immediately adjacent garage?
In the garage, we will get about 18 cm of screed with a 10 cm slope.
What is the advantage/disadvantage of a welded membrane in the garage and how have you implemented this in your homes?