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Thread: Insulation: joists are 14 1/2" on center, Insulation is 16"

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    Insulation: joists are 14 1/2" on center, Insulation is 16"

    So myhouse was built in 1956. I guess they did stuff differently way back before electricity. I just tore out the drywall and old heavy insulation from the ceiling inthe garage which is also the floor of the upstairs room. The joist are 14 1/2" on center. Insulation I think is 16" wide. will it matter if I bunch up the extra 1.5 " in the joist. .
    It\'s sometimes better to be lucky than smart.

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    shouldn't just try to keep it fluffy. when you build a wall and measure for studs, 16 on center, that figure of 14.5 always comes to mind.

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    NO it will make little difference bunching it up. That's not such an uncommon issue, I find it a lot especially in late 1800 - early 1900's homes where the joists are 12" on center then it's a better option to cut the rolls bit at 14 1/2" centers your good to go.
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