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

Dense packed cellulose walls

Lan3fPBEwv | Posted in Green Building Techniques on

We’re building a structure with double framed exterior walls to be dense-packed with cellulose. An exterior 2×4 structural wall will be combined with a non-structural 2×4 interior wall. The walls will have a one inch gap between them for 8″ of dense-packed cellulose blown behind insulweb netting. We live in central Pennsylvania. Cold winters, hot summers. Lots of precipitation year round. Can we get away with this wall structure without planning on adding rigid insulation to the building’s exterior, or will we be asking for condensation problems on the inside of the exterior sheathing on cold winter days if we don’t add the rigid? Housewrap, flashing tape, etc will be used as standard. Thanks, Doug Plitt

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.


  1. GBA Editor
    Martin Holladay | | #1

    Your question is discussed in this article: How Risky Is Cold OSB Wall Sheathing?

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |