Duro-Last Inc. has announced that 1½-inch and 2-inch thick, 4-by-8-foot Duro-Guard ISO (Polyisocyanurate) insulation is available from all Duro-Last manufacturing locations.
On Oct.31, 2013, the National Building Code (NBC) of Canada adopted the most recent version of CAN/ULC-S704-11, the standard specification for polyiso in Canada.