Because it isolates the concrete s thermal mass from the inside space however it is the least desirable from the standpoint of energy conservation.
Rigid insulation on concrete wall.
There is almost no mess and the foam isn t itchy like fiberglass.
After that thin furring strips are installed on top of the foam to provide a firm base for the drywall screws and drywall.
Polystyrene foam boards commonly called foamboard are a clean lightweight convenient way to insulate bare concrete walls.
Concrete walls can be insulated on the interior or exterior face or by embedding the material within the wall.
This refers to insulation uninterrupted by furring or by the webs of concrete masonry units.
One of the options the iecc prescriptive r values iecc table 502 2 1 calls for continuous insulation on concrete masonry and other mass walls.
The correct method of using rigid foam is to run continuous 4 foot by 8 foot sheets of the foam across the concrete basement wall making the rigid foam the de facto wall.
Examples include rigid insulation adhered to the interior of the wall with furring and drywall applied over the insulation continuous insulation in a masonry cavity wall and exterior insulation and finish systems.
Three basic types of thermal insulation are available rigid board batt or blanket and spray on.