How can you tell how much insulation is in your walls?

  5 answers
  • Redcatcec Redcatcec on Dec 02, 2018

    Hi Karen,

    You would have to drill a hole and take a look. Then repatch the hole.

  • Karen Karen on Dec 02, 2018

    Thank you I assume you drill the hole on the exterior of the house,do you need a camera/scope of some kind

  • William William on Dec 02, 2018

    Cut an inspection hole in the wall and look inside with a mirror and flashlight. About 4" square hole would work. Then just patch the hole.

  • Seth Seth on Dec 02, 2018


    Have your local utility company perform an energy audit. Almost all utilities have energy saving programs and will perform free audits. They will use a thermal camera and tell you where you have insulation. It will be a good way to get an idea of what you have for insulation all over your house and not just one specific location. An old school way is to remove one of your wall socket cover plates. (Shut power off to the socket first.) You might be able to see if there is any insulation surrounding the junction box and might be able to slice away just a small piece of drywall that will still be covered by the plate to get a better look. You can also insert a straightened coat hanger and see if you pull any insulation out with the hooked end. This will only show you something in that one area.

    • Karen Karen on Dec 02, 2018

      thank you seth I didn't know what a junction box, how to patch a hole after I make one and half of what you were telling me to do. So I took what you said to do step by step and with alot of redo's and hiccups along the way, but I finally did it. My local electric company helped out alot. I found that my house was a little lacking on insulation around windows and door frames. So thank you for your help.

  • Seth Seth on Dec 02, 2018

    You are welcome.