The panels provide a continuous energy efficient surface.
Rigid foam subfloor.
Follow with a 2x4 frame wall and insulate it with batt insulation.
Tape the seams of the foam panels with heavy duty construction tape.
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.
Rigid foam insulation creates a solid barrier between the inside and outside of your house acting as an obstacle in the way of heat and cold transfer.
Lay sheets of high density rigid foam over the polyethylene.
However not all rigid foam insulation packs are created equal.
Continuous layer of rigid foam insulation keeps floors warm and comfortable.
There are several ways to install subflooring above the rigid foam.
Basement subflooring has so many jobs at hand.
Thermaldry insulated subfloor system will not attract mold or be damaged by moisture.
How doers get more done.
Rigid foam is a nice option because it provides an excellent thermal break between concrete and flooring.
Provide a flat level surface for the finish flooring.
Lay rigid foam.
Rigid foam insulation.
Insulation and subflooring get installed in a single step providing fast hassle free installation.
Use a utility knife to cut the foam to size a hacksaw or drywall saw also work well for this.
Keep in mind that any interior rigid insulating panel must be covered by a barrier.
Leave a 1 4 inch gap around the perimeter.
Thermaldry insulated subfloor benefits.
Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding.
Unlike above grade sub flooring basement sub floor has to do all of the usual things and more.
A common choice is drywall.