The COMFORTBOARD™IS product is a rigid mineral wool insulation sheathing board that is non-combustible, water repellent, fire resistant and sound absorbent. Comfortboard™IS is an exterior non-structural insulation sheathing that provides a continuous layer of insulation around the residential building envelope.


This product is specifically engineered as exterior non-structural insulation sheathing for high performance residential wall systems.


  • Easily cut
  • Non-combustible
  • Excellent sound absorbency
  • Vapor Permeable
  • Does not rot
  • Does not promote growth of fungi or mildew 
  • Low moisture sorption
  • Chemically inert; non-corrosive
  • Water resistant
  • CFC - and - HCFC free, product and process
  • Made from natural & recycled materials
  • Earns LEED® points


How to Install Insulated Sheathing Around Windows - Part 1

How to Install Insulated Sheathing Around Corners and Obstructuions - Part 2