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

Air barrier for existing masonry party wall?

Jon Chizacky | Posted in Green Products and Materials on

Hi.  I’m wondering if anyone has any experience with spray-applied air barriers for existing masonry party walls. 

I’m in Philly designing Passivehouse infills and we need a way to continuously air seal the face of adjacent brick party walls to maintain our envelope.  We usually use closed cell spray foam, but it is not accepted as a reliable air barrier.  Any product or method suggestions will be greatly appreciated.  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.

Replies

  1. GBA Editor
    Martin Holladay | | #1

    Jon,
    For more information on using spray foam as an air barrier, see this article: "Air Leakage Through Spray Polyurethane Foam."

    If closed-cell spray foam is installed at a thickness of 3/4 inch or more, it's an air barrier.

    If for some reason you want to use a different product, a fluid-applied water-resistive barrier would work. For more information, see "Housewrap in a Can: Liquid-Applied WRBs."

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |