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How much blown-in cellulose can you put on top of a 5/8″ drywall ceiling?

user-974877 | Posted in Green Building Techniques on

I have trusses on 24 inch centers and plan on at least 12 inches of cellulose. When do you have to use something stronger like OSB and how is it finished?

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  1. GBA Editor
    Martin Holladay | | #1

    Larry,
    For a detailed discussion of your question, see Is 5/8 drywall sufficient to support R-60 cellulose in a ceiling?

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