Does polyurethane foam have the approval of the building code?
Yes; Efficiency Plus is a polyurethane foam that has been evaluated by the Canadian Construction Materials Center and has met the physical requirements for use in building construction projects in Canada. It is recognized by the National Standard of Canada under the National Building Code Material standard CAN/ULC-S705-1. It is also recognized in the National Building Code in the Application standard CAN/ULC-705-2.