I am renovating the basement at home. Half of the basement wall is above ground and the other half below. A couple of years ago, I redid the drainage and insulated the outside with Pordrän below ground. Above ground, I insulated with styrofoam and installed new Steni base boards according to the instructions. The basement wall consists of plastered hollow brick on the inside.
Now to the problem:
I am going to build a laundry room/bathroom. How do I need to construct the wall? The idea was to use steel studs/OSB/gypsum? I am also going to run new electrical wiring in the wall, so I won't need to groove it if I use studs.
I have a similar project ahead of me and after searching for information, I will be using steel studs and wetroom plasterboard. Unfortunately, it will be more expensive and more difficult to screw things up since I won't have OSB behind the plasterboard, but at the same time, it feels reassuring not to have any organic material that can absorb moisture. I will place the steel studs about 20 mm out from the wall to create an air gap behind and then insulate the stud wall with stone wool boards (I will read more about the insulation).
EDIT: I just saw that you mentioned bathroom. I will probably build these walls with 95mm Leca blocks.
Why wouldn't it give much? I do have 100mm isodrän under the ground, but above it's just 40-50mm of foam plastic on the outside.
Interesting if there is OSB that can handle moisture, I missed that.
Regarding alternatives to the Leca wall, maybe there are cement-based boards that are approved for wet rooms without having to put plywood behind? That would be easier to mount on steel studs than to build up a wall.
I also don't think insulation makes much of a difference. I have 140 m2 in the basement/souterrain level with no insulation at all. The walls are made of leca. 140+140 m2 with around 18,000 kwh per year.
The question regarding wall construction got stuck, so I sent an email to Knauf to ask about their Aquapanel and received this response:
"Yes, it is absolutely possible to mount Aquapanel directly on the studs.
The wet room board is approved, with one layer of board, to be mounted at a center-to-center distance of up to 600mm.
You can either mount the panel vertically on cc 450 or horizontally on cc 450 or cc 600.
http://www.knaufdanogips.se/index.php/montage/montage-system-innervagg/vatrumsvaggar/montage-vatrumsvaggar-aquapanel-indoor"
If I understand correctly, seams that do not have a stud behind them must be glued, so even though the large boards are cumbersome, I will probably use them standing in the wet areas.
Regarding insulation, I think you are right after doing some googling.
Just finished my basement bathroom.
Built up with 95mm Leca about 10cm in front of the exterior walls. Had some sewer pipes, water, and electricity from the upper floor that needed to be hidden.
Insulated behind the Leca with 100mm rock wool against the exterior walls. I know you shouldn't insulate from the inside, but what can happen?
Don't think insulation does much either. I have 140 m2 in the basement/souterrain floor and no insulation at all. Walls made of leca. 140+140 m2 with about 18,000 kWh per year.
Old post but still, you have no insulation in the basement? Doesn't it get cold? Is it furnished?
Old post but still, you have no insulation in the basement? Doesn't it get cold? Is it furnished?
we keep 20C and use about 15000 kWh per year while heating 280m2 so leca blocks are fine insulation. Waterborne underfloor heating throughout the floor, radiators upstairs
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