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

Should I dense pack my attic ceiling? Pros adn Cons?

kaczmap | Posted in Energy Efficiency and Durability on

Hi,

I need to re-roof my entire house including removing all of the sheathing.

I see this as an opportunity to re-insulate an attic bedroom.

One contractor recommends (he has great references) to re-roof and then use dense-pack cellulose to fill the void between the sheathing and attic ceiling with cellulose. I like the idea – it seems to maximize the r-value.

Should I be concerned about moisture?

I am wondering about doing this without an ariway to vent the space between the sheathing and the attic ceiling.

I’d apreciate any thoughts or other cost-effective options I should consider.

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. AdrienneBurt | | #1

    Check out this paper on unvented roof assemblies. There are scenarios for all types of climates.
    http://www.buildingscience.com/documents/reports/rr-0108-unvented-roof-systems/view?topic=/resources/technical_resources

    Others may be able to answer your question, but would need to know where your house is.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |