Air barrier

Air barriers control air leakage into and out of the building envelope. Air barrier products may take several forms:

  • Mechanically-attached membranes, also known as housewraps, usually a polyethylene-fiber or spun-bonded polyolefin, such as Tyvek is a generally accepted moisture barrier and an air barrier (ASTM E2178).
  • Self-adhered membranes, which are typically also a water-resistant barrier and a vapor barrier
  • Fluid-applied membranes, such as heavy-bodied paints or coatings including polymeric based and asphaltic based materials
  • Closed-cell medium density spray-applied polyurethane foam, which typically provides insulation as well
  • Boardstock, which includes 12 mm plywood or OSB, 25 mm extruded polystyrene, etc.
  • Some open-cell spray-applied polyurethane foam that are of high density
This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.