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Settling of cellulose in 2×6 walls

Steve Young | Posted in Energy Efficiency and Durability on

I have 10 foot 2×6 walls with 6 inches of polyiso foam on the exterior. We are looking at spray in cellulose for those stud cavities – not dense pack, but wet applied.
Do i have to worry about settling? If so, how might I prevent such settling?

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  1. Expert Member
    Dana Dorsett | | #1

    Using a "stabilized" damp sprayed cellulose containing water activated adhesives should not settle- the adhesives keep that from happening. Using damp sprayed goods without the adhesives isn't quite the same.

    Shrinkage of damp sprayed cellulose in 2x6 framing after drying causing a tiny gap between the cellulose & studs, big enough to be visible in infra-red imaging has been reported here by Armando Cobo (a builder in TX who posts here from time to time.) If you leave it open long enough to really dry that can be caught & possibly corrected by inspection.

    See:

    https://www.greenbuildingadvisor.com/patrick

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