Hello!

I plan to extend an old cabin by 2 square meters to accommodate a shower cabin. Everything is on beams, making it relatively easy to add a couple more and frame. My question is what you recommend for building the walls and floor and the order in which everything should be done. Moisture barrier, drywall, etc.

The floor is particularly interesting.

THANK YOU!
 
Thanks for the tip, but just a couple of things.
Is asfaboard and then insulation enough? No moisture barrier?
The extension will not be 1x1 because that would only be 1 sqm. It’s not going to be built as a square but rather two walls will be "moved" further out for better symmetry and space.

Do you have any experience with walls?

Thanks again.....
 
Bob_the_builder
Hello!

An alternative to double layer floor gypsum under tiles is to space the joists at 30 cm centers. There is a special "våtrumsspånskiva" that might be suitable for the purpose. Slope towards the floor drain can be arranged with leveling compound. Waterproofing afterward, absolutely (if we're talking ceramic tiles and not a vinyl floor covering). Be sure not to include a plastic film (vapor barrier) in the wall. Moisture can get trapped between it and the waterproofing.

As for the walls, just continue with the framing structure the walls already have. If it doesn't matter, I suggest using upright 45x145 (maybe just 120) for a non-winterized cabin. If it is permanently heated, it may be appropriate to use a cross-braced structure to reduce the so-called thermal bridges. For example, 45x195 upright and 45x45 horizontal, with insulation in both layers. If it will be heated in winter, it might also be relevant to increase the dimension of the floor beams to accommodate more insulation.

Good luck!
 
Again, thank you for the tips, but the question about the walls remains. What should they be made of and in what order? What should be used as a moisture barrier, is it necessary?

THANKS
 
Bob_the_builder
Thought I had already tried to answer, but I'll have to elaborate on it ???

Without knowing anything about how the house looks and how my suggestion would fit, this is a possible solution:

From the inside:

1. Tile
2. Tile adhesive
3. Approved waterproofing system (e.g., Casco, there are at least 100 different systems)
4. 2x13 mm Gypsum board with staggered joints
5. Vertical studs 45x145 c/c 600 mm
6. Mineral wool 145 mm between the studs
7. 9 mm exterior gypsum or 13 mm asphalt board (wind barrier)
8. Horizontal battens 28x70 c/c 400 mm
9. Vertical paneling 22x120, with battens or cover boards.
 
Or with this adjustment

4. 1x13 mm gypsum board with staggered joints
5. Vertical studs 45x145 c/c 450 mm
 
"But "4. 1x13 mm Gypsum board with staggered seams"??" :-[

not always good with copy & paste, forget all the other stuff....

should only be 1x13mm gypsum board......
 
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