Weather Resistive Barriers (WRBs)

June 4, 2020
Weather resistive barrier’s (WRB) assembly provides separation between the conditioned space and the exterior.


Weather resistive barries need to control

  • Heat
  • Air
  • Moisture flow
  • Rain and rain penetraction
  • Vapor
  • Light, solar, and other radiation
  • Noise and vibration

Types of weather resistive / water resistive barries

  • Self-adhered sheet
  • Fluid-applied membrane
  • Closed cell, medium density spray polyurethane foam
  • Factory-bonded membranes to sheathing
  • Boardstock, rigid cellular insulation board
  • Mechanically attached flexible sheet