There are several ways to install subflooring above the rigid foam.
Installing rigid foam on basement floor.
Insulation vapor barrier under basement floor.
The walls of the foundation were poured last week and they will backfill on monday 9 17 18.
Seal the joints with a sealing tape tyvek etc and then seal the bottom joint at the floor level and the top joint at the subfloor above with an expanding spray insulation foam use the one you would use for a window installation.
All foam boards absorb water vapor.
We plan to insulate the inside walls of the basement with at least the r10 foam board.
Basements require special subflooring that will not get moldy or deteriorate when exposed to moisture.
Concrete basement floor.
7 basement flooring options.
If your basement slab lacks sub slab foam you ll have to install the insulation above the slab.
We are in the process of building in maine.
They put the black tar stuff painted on the outside.
Eps xps foam insulation styrofoam sealing and insulating rim joists fibergl vs rigid foam insulation basement insulation how to insulate spray foam vs rigid insulation.
On september 6 2020 by amik.
Installing rigid foam on basement floor.
It will degrade its r value.
When installing the foam use caulk or tape for maximum insulation between the material and the board or floor.
It seems like installing the xps on the walls first and across top of wall taping foam all seams then installing xps on the floor taping all seams and tape foam at the wall junction followed by t g subfloor 4 6 tapcom per sheet with 1 4 1 2 gap around wall perimeter for expansion would do the best at sealing the entire basement wall.
2x4 sleepers installed on center every 12 16 inches and fastened down with rigid foam insulation 1 1 2 inch thick placed between the sleepers.
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.
Cover the insulation with a vapor barrier before you install it.
Keep foam board insulation away from direct sunlight prior to installation.
Make sure the foam boards run from the floor to the underside of your floor deck above.
Rigid foam is combustible so by code must be sealed in by a thermal barrier of either drywall or 5 5 of roxul with the latter providing added insulation in a critical heat loss zone provide sound dampening to the above floor.