Hello.
With the help of a good friend, I have finally managed to pour in the summer cottage. It's an old kitchen that will now become a bathroom instead. The idea was that I would frame the walls myself, but as an amateur, it seems to be more difficult than I thought.
The walls differ between ~2-4cm from top to bottom, depending on where you measure.
I was thinking of using standing studs 45x45 or 45x70; electricity for the washing machine should be prepared, then I assume that water pipes to the sink, shower, and washing machine look best if you run them in the wall? Therefore, I'm considering if lying studs might be better after all? I need all the tips I can get. The idea is to put tiles on the walls later, is that a bad idea considering the initial situation?
 
  • Interior renovation of a summer cottage showing a concrete floor, unfinished walls, and labeled plumbing for a washing machine, shower, WC, and sink area.
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m2h m2h said:
Hello.
With the help of a good friend, I finally got the casting done in the summer cottage. It's an old kitchen that will now become a WC instead. The plan was for me to frame the walls myself, but as an amateur, it seems to be more difficult than I thought.
The walls differ between ~2-4cm from top to bottom, depending on where you measure.
I was thinking of using standing studs 45x45 or 45x70, electricity for the washing machine should be prepared for, then I assume water pipes to the sink, shower, and washing machine would look best if routed in the wall? Therefore, I'm wondering if horizontal studs are the best after all? I need all the tips I can get. The plan is to put tiles on the walls afterward, is that a bad idea considering the starting point?
Keep in mind that built-in water pipes in an exterior wall can be risky if the exterior wall has thin insulation. If you're going all-in with a safe water solution, then it's 45x70 that applies, cc45. First, decide if you are going to create a wet room according to the insurance companies and safe water standard or your own workaround. That will then determine how you can/must do it.
 
P Per i Hamrånge said:
Keep in mind that built-in water pipes in an exterior wall can be risky if the exterior wall has thin insulation. If you're going all-in with a secure water solution, 45x70 is the standard, cc45. First, decide if you're going to create a wet room according to the insurance companies' and safe water guidelines or make your own unconventional solution. That will then dictate how you can/must proceed.
The exterior walls have 70mm+45mm right now, then 45mm on the inside now too, is that sufficient?
Okay, I plan to do it as seriously as possible, I have many skilled acquaintances I can consult if I get stuck. How is it usually done in new constructions, do they mostly lay the pipes on the outside?
 
M
m2h m2h said:
The outer walls have 70mm+45mm right now, then 45mm on the inside now as well, is that enough?
Okay, I plan to do it as seriously as possible, I have many skilled acquaintances I can consult if I get stuck. How is it usually on new builds, do you usually put the pipes on the outside?
There is a lot of useful information here.
https://www.sakervatten.se/FILEARCHIVE/8390434DA14B85FD0431CBD51BCAA1D3.pdf

These days, water is usually placed in the wall with "pipe in pipe" since it looks neat. Just note that you can’t have any connections inside the wall and must have a distribution cabinet.
 
m2h m2h said:
The outer walls have 70mm+45mm right now, then 45mm on the inside as well, is that enough?
Okay, I intend to do it as seriously as possible, I have many skilled acquaintances I can consult if I get stuck. How is it usually done in new constructions, do they most often place the pipes on the outside?
I had a house with 120mm insulation in the outer wall. We added 45mm studs and insulation on the inside. In the installation layer, pipe-in-pipe was placed. This froze. It's enough to have a small gap or defect in the outer wall where cold air can creep in for it to freeze. With external pipes (at least on the outer walls), this is never an issue.
 
Thank you for the PDF file, very good information there.
Then maybe it's best to put water on the outside. I was thinking of starting to frame the walls, should you have sillseal between the floor and the stud or is it enough to have a few centimeters gap? Self-leveling compound will also go on the floor, should that be done first?
 
M
m2h m2h said:
Thanks for the PDF file, very good information there. Then maybe it's best to add water on the outside. I was thinking of starting to frame the walls, should I have a sill paper between the floor and the stud, or is it enough to have a few centimeters of space? Floor leveling compound should also be used on the floor, should that be done first?
Internally, sill paper is not needed. It's only to prevent moisture from rising through the end grain from the ground. You are supposed to fully screw the plywood, that is, around the entire board. So first place studs in the ceiling and floor, and the upright studs between them. Put on the plywood and then gypsum. Level the floor last. It's easier to build panels before leveling because the floor is (hopefully) straighter so you avoid cutting the panels too unevenly. Additionally, the floor leveling compound against the gypsum creates a tight joint, reducing the risk of the waterproof layer being damaged due to a hollow space behind. Don't forget to lift the plywood about 10 mm from the floor.
 
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m2h
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m2h m2h said:
The walls differ between ~2-4cm from top to bottom, depending on where you measure.
I was thinking of framing with vertical studs 45x45 or 45x70
You have the opportunity to straighten the walls when you set the new studs. A difference of 4 cm in a corner doesn't look great with tiles. At least not with smaller tiles.
 
We placed foam plastic before casting to mitigate the thermal bridge; how should this be done? It's probably best if the foam plastic can stick up a bit before the rule comes; is that possible or how should it be done? I'm attaching two pictures so you can see what I mean.
 
  • Interior room under construction with a window, tools, and scattered debris on the floor, featuring a piece of foam board insulation near the window base.
  • A saw with a red handle lies on a concrete floor next to a wall, with visible insulation and debris.
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Petjoha
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The simplest way is to build a cage with studs that are plumb. Thus, you take a top and bottom rail and mount equally long studs between them. Keep in mind that in the corners, you should be able to screw together the cage and also screw in plywood and wet room boards; it's easy to forget that. You need two studs in each wall in every corner. If the window is not plumb, it is usually easier to cut angled trims than to tile walls that are not plumb.
 
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