Once the insulation has been placed you will want to cover it up with plywood.
Installing rigid foam insulation on basement floor.
Step 5 cover with plywood.
Rigid foam insulation basement floor.
In other words rigid foam can be applied on walls foundations and roofs and works great for both retrofits and new constructions.
Ideally you want to have rigid foam insulation in a basement against all the outside walls and the floor a minimum of five centimetres on the walls and 2 5 cm on the floor.
I posted on the basement insulation site but i ve developed my thinking a little more and now ponder whether this would work for the concrete basement floor that i very much want to finish in ceramic tile 6 poly 1 xps foam 3 4 advantech 1 2 hardibacker thinset and 1 4 tile.
Step 4 install the insulation.
Place your rigid foam insulation between the sleepers in the open areas.
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.
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The inspector may require you to cover the new insulation with drywall as a fire block or leave some areas uncovered to allow for termite inspections.
Save time and space in your basement with owens corning foamular insulpink extruded polystyrene xps insulation.
If your basement slab lacks sub slab foam you ll have to install the insulation above the slab.
Rigid foam is the best insulation for rim joists.
It installs easily with furring strips an.
There are several ways to install subflooring above the rigid foam.
You can insulate second floor rim joists following the same steps shown here if you happen to tear out a ceiling during remodeling.
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.
All rigid foam insulation is mould and mildew resistant.
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