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Can pressure-treated lumber be used inside of a dwelling as framing material?

...such as where basement partitions on bottom plates of a wall or where concrete meets lumber, and what type of barrier is required between lumber and concrete?

Asked by John Poulette
Posted Feb 7, 2013 9:37 AM ET
Edited Feb 7, 2013 10:53 AM ET


3 Answers

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Sure. However, if you moisture proof and use good moisture mitigation details and practices you would not need all that treated lumber.
What barriers to use? Use a 10 mil. Moisture barrier and stone layer under concrete; A capillary break between the concrete wall and the footing; a good wall waterproofing, and a good drainage system in the basement and on ground level. All those techniques combined will prevent moisture from coming inside. I'm attaching a great paper by Building Science Corp.

Basement - Understanding Basements.pdf 1.16 MB
Answered by Armando Cobo
Posted Feb 7, 2013 12:02 PM ET
Edited Feb 7, 2013 12:04 PM ET.


It is required by code hereabouts

Answered by Keith Gustafson
Posted Feb 7, 2013 1:53 PM ET


The 2009 IRC code allows bottom plates of regular lumber as long as the concrete wall or slab is separated by an impervious moiture barrier. The issue could different if a local code mandates it or if you don't want to figh a building dept. or inspector.

Answered by Armando Cobo
Posted Feb 7, 2013 8:28 PM ET

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