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

BIBS vs. dense-packed cellulose

Patrick Krekelberg | Posted in Green Building Techniques on

The debate rages on, or maybe in most folks’ minds it’s been settled. I still haven’t decided, for our Zone 7 project.

I like BIBS because I believe it should be less prone to settling, but has a higher embodied energy with less recycled content.

I like cellulose because it is getting so common, includes borate to repel ants (and mice??) , but I believe may also contain flame retardants I am not too excited about. Also as an engineer/scientist I can picture it settling or holding onto moisture, but only on a theoretical level, that is not based on experience.

What are your thoughts?

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. Patrick Krekelberg | | #1

    seems like this answers it pretty well:
    https://www.greenbuildingadvisor.com/question/dense-packed-dry-cellulose-any-downsides

    Anyone still using BIBS? If so, what is your rationale?

    1. Expert Member
      Malcolm Taylor | | #2

      Patrick,

      Dense-Packed cellulose for walls is still rare here, and until that changes, installers have developed the experience necessary, and established a good track record, I wouldn't be specifying it. That may be a regional concern, but it may still be quite a common one.

      In the discussion you linked to the question of settling was dismissed as being solved, but in the blog Martin published today it appeared to be a factor in the problematic roof assemblies BSC were testing.

      What are the advantages of batt insulation?
      - Easy visual inspection.
      - DIY friendly.
      - Much easier to make modifications or renovate in the future.
      - Better fire resistance.

      What BIBs doesn't do is hold water, which can be a negative, as cellulose can provide beneficial moisture-buffering in cavities.

      Both types of insulation appear to perform well if installed correctly.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |