1200 sf. CGSB 6 mil. Vapour Barrier, 12 ft. Canadian General Standards Board (CGSB) approved vapor barrier. Contents: 12 ft. x 100 ft. (3.7 m. x 30.1 m.) Coverage: 1200 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.