Silicon?
This is what I started doing thirty years ago, still have no problems.
http://www.tilersforums.com/members/pjc-albums-dewalt-picture33800-2011-09-22-17-50-37-a.html
And then Silicon the joint like this.
http://www.tilersforums.com/members/pjc-albums-dewalt-picture33801-2011-10-07-12-18-07-a.html
No it’s a friend of mine. He does a lot of exhibitions for them.That kingdom of dewalt on the back of the van is it yours?
As a human, SwedishMike is a complete goon that would benefit from a good hiding. However, I live in Norway specialising in wetrooms, and if regulations are same in Sweden as they are here, he's right. Every water joint inside a wall must have an inspection hatch, end of story.