5,632 views ·
31 replies
6k views
31 replies
Level sand?
If you have wooden sills that the exterior walls stand on, it's important to do it right, as the moisture pressure increases here. Perhaps an extra loop.
The existing concrete slab, which will now get foam insulation on it.
I just got a quarry that can transport home for me. There was gravel 2-4mm unwashed. Then there was sand 1-5 which was washed. Do you still think that gravel is the most suitable? Yes, it is wooden base coated with some impregnation. Some also have axel roofing felt under.
Picture of sill please. I would have chosen washed 1-5.
S
SueCia
Electronics enthusiast
· Dalarna
· 5 516 posts
SueCia
Electronics enthusiast
- Dalarna
- 5,516 posts
Your house may very well be built with a pressure-treated sill without paper underneath (like mine). The risk with doing what you're thinking is that the slab will become more humid, and since the moisture can't be ventilated anywhere, it will start to be absorbed by the sill instead.
I believe that you should either not insulate at all and go with a ventilated floor, or break away the entire slab and do it all correctly.
I believe that you should either not insulate at all and go with a ventilated floor, or break away the entire slab and do it all correctly.
This must be removed.
Maybe cut the boards 300 up, free up next to the studs, place post anchors against existing concrete. Then cut away the stud, lay down tar paper and let the concrete fill up. Then place a new sill on top of the new concrete.
Okok is it that bad? Can't you lay foam plastic as a distance against the wall and not cast all the way to the outer wall. Is it so likely that the existing slab will become damp when there is foam plastic between the slabs?
Impregnated and cast-in-place sills are a known risk construction. What you are planning to do now changes the conditions, likely for the worse, and thus the risk of ending up with a sick house.
We also have cast-in-place sills, though not impregnated, and avoid making any changes. Underfloor heating would be nice but is not an option for this exact reason.
You now have a unique chance to remedy this construction, take it - as it will not come again.
We also have cast-in-place sills, though not impregnated, and avoid making any changes. Underfloor heating would be nice but is not an option for this exact reason.
You now have a unique chance to remedy this construction, take it - as it will not come again.
It was wrong already before, but the cellplast can worsen it. Then there are many houses with this solution that work well, but there is always a risk.

