GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X 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

Retrofit Spray Foam Insulation with Cathedral Ceilings

Adrock0017 | Posted in General Questions on

I’m considering having my attic, crawl space, and rim joists insulated with spray foam to make my house more comfortable. The house has two attics with a slanted cathedral ceiling between them. One of the attics butts up against an additional slanted cathedral ceiling. My understanding is spray foam will seal the attics and no longer allow them to breath. Will I have a problem if I spray the open attic spaces but leave the cathedral ceilings insulated with fiberglass? 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

  • |
  • |
  • |
  • |