Planning to dig out the basement, pour new concrete, and tile. However, the house is cast directly on the ground, so the exterior wall ends 150 mm below the floor. Don't want to dig deeper than the drainage, so how should it be done? Place construction plastic, insulate 50 mm, and pour 100 mm concrete? Can underfloor heating be installed at a reasonable cost on that?
Can you afford to sacrifice some ceiling height? Then maybe you can achieve at least 15 cm of insulation under the slab. If you use capillary-breaking cell plastic (Pordrän/Isodrän), you also don't need a layer of macadam underneath.
The ceiling height is currently 1.94, so I don't want it any lower. If I don't install underfloor heating, what do you think the subfloor preparation should look like?
Feels like the under layer will look like this.
Klinker
Platta 900
Fiberduk
isodrän 650
fiberduk
How does that sound??
Klinker
Platta 900
Fiberduk
isodrän 650
fiberduk
How does that sound??
Sounds like a fully functional slab, but if you choose to have underfloor heating in it, it will be quite expensive to operate considering the relatively thin insulation. The question is, what is the comfort worth to you?
I will not install underfloor heating because the groundwork cannot be done correctly. Now it was very difficult to get hold of Isodrän boards, so I wonder what alternatives there are? Can you use regular construction plastic as a capillary break and take regular foam? Or am I thinking wrong? Is it unwise to put plastic underneath? What I liked about Isodrän was that the whole slab could "breathe". Get wet and then dry.
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