GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Differences Between Air Barrier Membranes

qofmiwok | Posted in GBA Pro Help on

The specs for popular self-adhered air barrier products are all over the map for air leakage.  From .04 cfm/sf to .00004 cfm/sf.  Does it make any difference at those numbers?  Or are they all airtight enough and it’s just marketing?  I suspect workmanship and detailing are way more critical than which barrier gets used? Also, is it necessary to tape plywood seams prior to adhering the membrane to get PH level ACH50’s? Thanks

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |