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    Terricm12's Avatar
    Terricm12 Posts: 1, Reputation: 1
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    #1

    Feb 19, 2018, 09:23 AM
    Can you put loose cellulose insulation over knob and tube in attic
    Can you put loose cellulose insulation over knob and tube wiring in attic ?
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #2

    Feb 19, 2018, 12:59 PM
    NO. See prior post reply.

    K&T. Uses Not Permitted NEC 394.12 2012 edition
    (5) Hollow spaces of walls, ceilings, and attics where such spaces are insulated by loose, rolled, or foamed-inplace insulating material that envelops the conductors.

    The reason is that knob and tube wiring was designed to operate in open air. Any insulation covering K&T wiring will cause the wiring to overheat.

    If the attic is easily accessible, why not be safe and convert to NM-B(Romex)



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