In his exclusive interview with House Digest, contractor Kevin Keen explained how to insulate a garage ceiling with rigid foam board, mineral wool, spray foam, and blown-in insulation.

Elevate's RESISTA is a high-performance polyisocyanurate (PIR) insulation board laminated on both sides to a gas-tight, multi-layered aluminum-kraft facer (AK) or mineral-coated glass fiber facer ...

While insulating walls and ceilings is a great idea ... In addition, the Rmax Pro boards create a continuous insulation; ...