First place a layer of 1 1 2 closed cell foam insulation board against the basement walls using a manufacturer s recommended adhesive.
How to install rigid foam insulation on basement floor.
Place your rigid foam insulation between the sleepers in the open areas.
Once the insulation has been placed you will want to cover it up with plywood.
You can use either one or two layers of plywood or osb and the subflooring can either be fastened to the concrete with long tapcon screws or it can simply float above the foam.
There are two ways to handle insulating concrete floors.
This is very common mainly because it is very cost effective.
There are several ways to install subflooring above the rigid foam.
Let s take a look.
Or as demonstrated here you can cover the slab with rigid foam insulation add two layers of plywood and then add the finish flooring.
You may need to cut the insulation down with a utility knife to make sure it fits properly between each grid.
It installs easily with furring strips an.
Your choice really comes down to blanket insulation aka fiberglass or xps.
You can attach wood sleepers to the floor fill the gaps with rigid foam insulation and then apply your finish flooring.
If your basement slab lacks sub slab foam you ll have to install the insulation above the slab.
Save time and space in your basement with owens corning foamular insulpink extruded polystyrene xps insulation.
Step 5 cover with plywood.
Make sure the foam boards run from the floor to the underside of your floor deck above.