Helpful? 0

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 Thu, 02/07/2013 - 09:37
Edited Thu, 02/07/2013 - 10:53

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3 Answers

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2.
Helpful? 1

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.

AttachmentSize
Basement - Understanding Basements.pdf 1.16 MB
Answered by Armando Cobo
Posted Thu, 02/07/2013 - 12:02
Edited Thu, 02/07/2013 - 12:04.

3.
Helpful? 1

It is required by code hereabouts

Answered by Keith Gustafson
Posted Thu, 02/07/2013 - 13:53

4.
Helpful? 1

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 Thu, 02/07/2013 - 20:28

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