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Putting insulation in a wall that has none

vY2rnST82B | Posted in Energy Efficiency and Durability on

Just moved into a new (to me) home in Southern California. A single family house, built 1965. I’m relatively new to DIY home improvements but fairly ambitious. I decided to work on upgrading a bathroom and started by tearing down the tub/shower wall in an upstairs bathroom. I got everything out to the bare studs and noticed there is no insulation. I see a thin black paper-like material that is breaking apart and behind that is (what I think) is concrete, then it must be the exterior stucco or something. So, before I build the wall back up, can/should I put insulation in this wall? Or is there a reason it has no insulation? Thanks for the feedback!

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  1. jklingel | | #1

    Have you searched here,, and Tons of info there for you. Good job on thinking of saving energy, too.

  2. GBA Editor
    Martin Holladay | | #2

    N. Yen,
    Yes, walls need to be insulated. Wall insulation is now required by building codes -- even in California.

    There are many types of wall insulation; all of them can work well if they are installed carefully and detailed properly. If you are totally unfamiliar with this work, however, it may be time to call a contractor.

    Here's some introductory information on insulation: Insulation Overview.

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