I have a partially underground basement which has concrete walls painted with waterproof paint. I’m building 2×4 walls inside the basement that will be covered with drywall. What kind of insulation should I use, and do I need a vapor barrier?

– Mike

Hi Mike,

Building codes usually require a vapor barrier (4 mil plastic sheeting) on exterior basement walls if the framing is attached to masonry or concrete surfaces, or if the wood framing butts up against the outer basement walls. You should then use fiberglass insulation that has a vapor barrier between the studs, with the vapor barrier facing in toward the living space. This will give you two vapor barriers, one before and one after the stud wall framing.

The other option is to set the 2×4 wall framing in 4” from the masonry or concrete basement walls, and use just the vapor barrier on the insulation facing toward the living space.

Also, be sure to use treated lumber for the bottom plate on the wall framing.

Good luck with your project,

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Danny Lipford


Danny Lipford is a home improvement expert and television personality who started his remodeling business, Lipford Construction, at the age of 21 in Mobile, Alabama. He gained national recognition as the host of the nationally syndicated television show, Today's Homeowner with Danny Lipford, which started as a small cable show in Mobile. Danny's expertise in home improvement has also led him to be a contributor to popular magazines and websites and the go-to source for advice on everything related to the home. He has made over 200 national television appearances and served as the home improvement expert for CBS's The Early Show and The Weather Channel for over a decade. Danny is also the founder of 3 Echoes Content Studio, TodaysHomeowner.com, and Checking In With Chelsea, a décor and lifestyle blog.

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