The Vapour Control Layer

Photo Source: Summerhill

Materials:

  • Polyethylene
  • Aluminum foil
  • Some oil-based paints
  • Special vapour retarder paints
  • Some insulation adhesives (mastics)
  • Some insulation materials
  • Metal and glass
  • Some exterior-grade plywood's

Placement/Location:

  • Roof or ceiling
  • Exterior walls above and below grade (interior or exterior side)
  • Can be installed part way throughout the wall assembly
  • Slab/foundation

NOTE: In the photo above you will notice the lack of acoustical sealant. The sealant is added after the poly is hung. This makes it easier and far less messy.