it's important to install a basement subfloor that provides insulation value, along with resistance to mold and moisture damage. These qualities are critical because of basement conditions: moisture from the slab (or from other sources, like water leakage) that can lead to mold and wood rot, and heat loss through the slab that can make your finished floor uncomfortably cold. ThermalDry Insulated Floor Decking, installed by Connecticut Basement Systems, offers many advantages over traditional plywood subflooring.