The Polyisocyanurate Insulation Manufacturers Association, the Institute for Market Transformation, and the Center for Environmental Innovation in Roofing have released the Roof and Wall Thermal Design Guide: Applying the Prescriptive Insulation Standards of the 2015 I-Codes.
Spray-foam has a reputation of providing superior insulating qualities compared to fiberglass batt, mineral wool, cellulose, and other insulation alternatives.
When it comes to preventing moisture damage, mold and other hazards caused by excess water, using water-resistant insulation in floors, walls and ceilings is crucial.