Installing Rigid Foam Insulation On Basement 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.

Installing rigid foam insulation on basement floor.

Once the insulation has been placed you will want to cover it up with plywood. 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. 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. Place your rigid foam insulation between the sleepers in the open areas.

You can insulate second floor rim joists following the same steps shown here if you happen to tear out a ceiling during remodeling. There are several ways to install subflooring above the rigid foam. By admin filed under basement. No comments rigid foam insulation is a good choice against the concrete many experts recommend leaving st basement insulating walls pin by nathan bremer on wall building foundation interior guide to correct how insulate your chicago tribune floor it up suloor what do behind diy room home improvement forum.

Rigid foam is the best insulation for rim joists. If your basement slab lacks sub slab foam you ll have to install the insulation above the slab. Step 4 install the insulation. Installing rigid foam on basement floor on september 6 2020 by amik 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.

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. It won t hold moisture even if you had a flood in your basement. All rigid foam insulation is mould and mildew resistant. In other words rigid foam can be applied on walls foundations and roofs and works great for both retrofits and new constructions.

It installs easily with furring strips an. Step 5 cover with plywood. You may need to cut the insulation down with a utility knife to make sure it fits properly between each grid. Not only does it provide high r values but foam board insulation is also easy to install lightweight and can be used in any room of your home.