Hello

I am decorating the upper floor of our Smålandsvillan. As a finishing touch on all the walls, I was planning to have a 45mm thick installation layer inside the vapor barrier. What I'm now wondering is if an installation layer of 45mm is thick enough to run pipes to the radiators? A lot of space is needed for all the 90-degree bends around corners, etc.

The idea of having an installation layer and running all the pipes and cables through it was to avoid making too many holes in the vapor barrier. But it depends on whether the pipes can be bent enough inside the wall to fit in this small space!
 
There should be no problem running the pipes in the installation layer. Like you, I have installed 45 mm inside the vapor barrier and used Wirsbo Combi PEX. The pipe bends used for bending and fixing where the pipes pass through the wall to the radiators require 70 mm, but since the plastic and insulation yield 25 mm easily, you don't need to take more. I ran the pipes inside the 45 mm frame.
 
How nice, now I can breathe a little easier. I was starting to worry that I had thought wrong...
How did you solve going around corners? Did you just fasten the pipe or did you use a cold bending fixture?
Is this pipe with a protective tube that you've used?
I thought the cold bending fixture for pipe-in-pipe (25mm) took up too much space to fit in a 45mm wall, but maybe it’s not needed?
 
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