DA membrane is an extra strong air-barrier/vapor retarder that is suitable for interior and exterior use in demanding conditions. It can be exposed to weather and direct UV for up to 3 months. >>Read More

Quantity Discounts
1-19 >> Pallet (20)
254.00 >> please inquire

In stock



  • Higher resistance to construction site conditions and humidity compared to conventional vapor retarders.
  • Vapor retarder membrane made from PP, protected on both sides by a polypropylene cover.
  • Air tight.
  • Very watertight, resists 8.2’ ft of water column.
  • Low vapor permeability (1.43 perms) – Sd-value 2.30m
  • Caution: DA should be primarily used in combination with vapor open materials and membranes. Do not use in wall/roof assemblies that contain vapor closed materials that restrict the drying potential (flatroofs, greenroofs, vinyl wall paper).
  • High thermo-stability
  • DA can be used for many demanding purposes. For instance:

  • In a heating climate, wrap the exterior of the walls with DA, before applying the exterior fibrous insulation, EPS, XPS or Poly-iso. Materials should be able to dry both sides of the DA.
  • In a cooling climate, use DA as an airtight WRB on the exterior that works as a vapor retarder. Keeping the humid air outside.
  • Can function as a temporary roof, when pitch is 10 degrees or more.
  • Suitable to be walked over, fabric provides traction.
  • Dimensions:

  • Roll width: 59″ (1.5m)
  • Roll length: 164′ (50m)
  • Roll area: 807 SF (75m2)
  • Download Links:

  • DA Product Specification (PDF)
  • 3 part spec – interior air- and vapor control layer (PDF)
  • DA Product Specification (PDF)
  • System Brochure (PDF)
  • 3 part spec – interior air- and vapor control layer (PDF)