Hello,
I thought I'd try this excellent forum.
We have purchased a property with a guesthouse that hasn't been used much for many years. The heating hasn't been working for a while, and the environment under the "crawl space" has been very poor with rocks and concrete covered by a soil layer. Water from the rocks has made the soil layer wet and almost resembled a mucky compost.
The space is now excavated, and I have removed the existing floor joists and wood chip insulation.
I am now going to insulate and install the floor joists, but I have a joist spacing of about 630mm, so I'm considering alternative solutions compared to the floor joist boards that are made for C/C 600.
My best alternative seems to be a tongue-and-groove XPS screwed to the underside of the joist.
But the floor is additionally insulated from the inside with EPS.
My question is whether I risk problems with this construction, mainly between EPS and XPS?
From the floor level, it looks like this if I install XPS:
- Chipboard flooring
- EPS
- Tongue-and-groove or similar plank floor.
- Insulated floor structure.
- XPS
Grateful for tips.
