1500 sf. CGSB 6 mil. Vapour Barrier, 8 ft. Canadian General Standards Board (CGSB) approved vapor barrier. Contents: 8.5 ft. x 176 ft. (2.6 m. x 53.6 m.) Coverage: 1500 sq. ft. Application: Vapour barrier for walls and ceilings, below concrete slabs, foundation damp proofing, sill poly, plate poly, etc. Benefits: Prevents moisture build up inside the home. Can protect duct work from rust or erosion. Can prevent the growth of mold and unpleasant smells.