I'm going to pour a floor for a future bathroom in my crawl space foundation. For various reasons, continuing with wood joists in the bathroom is not a good idea.
I'm thinking of filling with about 20-30 cm of gravel, 10 cm of EPS concrete, 10 cm of cellular plastic (+EPS concrete), another 10 cm of EPS concrete, and then self-leveling compound.
The space I'm pouring into currently has three walls. One is the wall against the outer wall, the second is a basement wall, and the third is the heart wall. I'll need to build a wall to close the "basin."
I have some concerns about whether this is a good solution or not.
But above all, I'm very uncertain about what to do where the concrete meets the wood joists. The bathroom wall is about 30 cm in front of the heart wall, so the floor joists extend 30 cm into the bathroom. I also have a bunch of floor heating pipes and water lines that go into one of the compartments. (See attached images). I've spoken with EPS, and they suggest it works well to cover all the wood with construction plastic.
Since the EPS concrete will be poured up to the top of the floor joists, the self-leveling compound will also lay on the subfloor for about 10 cm. Will that work? I was thinking of using construction plastic there as well to prevent adhesion.
Against the wall I'm going to build, I assume I can just lay construction plastic from the top of the floor joist down over the inside of the wall?
Should I have any spacing against the walls so the slab isn't cast into the wall (and doesn't become floating)?
It got a bit confusing, but I hope you understand!
/Jon
I'm thinking of filling with about 20-30 cm of gravel, 10 cm of EPS concrete, 10 cm of cellular plastic (+EPS concrete), another 10 cm of EPS concrete, and then self-leveling compound.
The space I'm pouring into currently has three walls. One is the wall against the outer wall, the second is a basement wall, and the third is the heart wall. I'll need to build a wall to close the "basin."
I have some concerns about whether this is a good solution or not.
But above all, I'm very uncertain about what to do where the concrete meets the wood joists. The bathroom wall is about 30 cm in front of the heart wall, so the floor joists extend 30 cm into the bathroom. I also have a bunch of floor heating pipes and water lines that go into one of the compartments. (See attached images). I've spoken with EPS, and they suggest it works well to cover all the wood with construction plastic.
Since the EPS concrete will be poured up to the top of the floor joists, the self-leveling compound will also lay on the subfloor for about 10 cm. Will that work? I was thinking of using construction plastic there as well to prevent adhesion.
Against the wall I'm going to build, I assume I can just lay construction plastic from the top of the floor joist down over the inside of the wall?
Should I have any spacing against the walls so the slab isn't cast into the wall (and doesn't become floating)?
It got a bit confusing, but I hope you understand!
/Jon
