How do you insulate a basement floor slab that isn't level?
- Save
- Like
- Comment(1)
- Share
L
How do insulate a basement slab that is sloped ?
Louis-François Lapointe
Nov. 11, 2020Last updated: Nov. 12, 2020
Hi everyone !
I have a 30x30 basement that I want to finish (on a budget). We live in zone 5a and the house was build in 1950. Normally I would've covered the slab with dimple membrane, 2" XPS and osb/plywood achored with tapcons. The problem here is that there's a significant slope to a central drain (4" at the lowest). I will be removing that drain and other old cast iron pipes. If I level with sleepers, there will be multiple breaks in the insulation.
My ideas was as follow : fill the sloped cavity with crushed stone trying to get it as level as possible, cover it with vapour barrier, add 2" xps and then subfloor.
Is there a better way to do this ?
Thanks for your help !
The best way to insulate a basement floor that is not currently level would of course be to first level it.至于你的情况，由于它是倾斜到排水管的，你有其他的计划来处理可能堆积在地板上的大量水吗?如果你要加石头来让它变平，你是不想离开排水道，还是说它现在不工作了?我想知道你们有什么计划来处理可能堆积的大量水，你们有水池泵吗?
But for the meat of your question, yes, you could level it with stone, I would get small stone to make your job easier, like 3/8ths perhaps. If the drain will no longer be in use, you could also do it with self levelling concrete.
至于表面处理和绝缘，是的，在那一点上，一个蒸汽屏障是必要的，因为在最初的施工中没有这样的屏障。
The sleepers would mean a break in the insulation, but if you don’t have them you may find the floor rather spongy.