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Dense pack cellulose vs fiberglass batts

Fretted | Posted in Energy Efficiency and Durability on

I have been unable to find a dense pack installer in my area and find that none of the appropriate insulation machine are available for rental anywhere near me. I have read where Habitat for Humanity in Denver has used three layers of fiberglass batts with good success. I believe cellulose is a better product but would appreciate any and all suggestions.
Rick Fetter

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  1. Expert Member
    BILL WICHERS | | #1

    How thick is your wall? If the batts don’t evenly add up to your wall thickness you’re going to have a challenging time of things.

    Personally I’d consider mineral wool too. It’s a little more expensive than fiberglass but easier to work with, and fireproof. I switched a while ago and will never go back! In your case, if you have to built it up in layers, the fact that mineral wool has a bit of rigidity to it (it holds its shape) will probably be very helpful since it won’t be constantly trying to fall down on you while you install it.


  2. AlanB4 | | #2

    I would not use fiberglass if it was free. Lots of experience tells me its garbage. Better then nothing but not as much as you might think.
    Mineral wool/roxul as mentioned is a good alternate but i would not give up looking for dense packed cellulose. And don't accept loose fill cellulose. Better then fiberglass but dense pack is where the money is.

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