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Insulation in between floors – is it necessary

user-7061227 | Posted in General Questions on

Hi,
Other than for sound attenuation, what are thoughts regarding adding insulation in basement ceiling and between first and second floor? Does it serve a purpose (other that sound reduction)? 
Thanks
H

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Replies

  1. Expert Member
    Michael Maines | | #1

    It depends whether your basement is insulated and conditioned. It should be, in which case insulation in the floor is not necessary. If your basement is not insulated and conditioned, floor insulation is required by code, at least in colder climate zones. What is your climate zone?

  2. user-7061227 | | #2

    Hi,
    Climate zone 5/Ct. building new house on old foundation and plan to insulate old basement walls with 2-3” cc (likely rigid board) and full rim joists with ccsf. Will try and vapor seal the floor… but not much to do there at this point. Rest of house double stud with dense pack cellulose.
    Thanks
    H

    1. Expert Member
      Michael Maines | | #3

      In that case there is no need to insulate the floor. Just make sure the basement has a heat source and a dehumidifier, to keep potential mold problems at bay.

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