As North American energy code requirements become more stringent, under slab insulation is key consideration for improving overall building energy performance.

ROCKWOOL COMFORTBOARD™ insulation provides reliable thermal resistance in the foundation slab assembly that will not change over time. Stone wool insulation will maintain consistent thermal resistance, even when exposed to moisture-an important consideration for under slab insulation.

When exposed to ground moisture, COMFORTBOARD™ will resists water absorption, reducing the risk of moisture damage occuring within the building basement. Any moisture that bypasses the insulation (contacting the vapor barrier) can drain and dry out of the assembly as stone wool is porous and highly vapor permeable. Furthermore, as stone wool is inorganic, the under slab insulation will not rot, corrode, or support mold or fungal growth when wetted. This greatly improves the durability of the foundation slab assembly.

Concrete floor slabs can be cold and uncomfortable if not insulated adequately. COMFORTBOARD™ insulation ensures that the floor slab remains at a pleasant temperature, improving the thermal comfort of building occupants.