Exception? To Using Treated Sill Plate For Basement Walls - Carpentry - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Carpentry


Thread Tools Display Modes
Old 12-13-2011, 03:30 PM   #1
Avid DYI'er
BriBri's Avatar
Join Date: Dec 2011
Location: North Shore, Massachusetts
Posts: 23
Rewards Points: 10

Exception? to using treated sill plate for basement walls

I have a relatively new house (built in 2000), and the foundation was coated with some kind of tar-like or rubber-like black substance up to about 2 feet above grade level. I am considering finishing off about 1/2 of the basement area into an additional family/rec room. The basement (concrete) walls never show any signs of moisture and are very smooth, and the floor is very smooth and level. The basement in general is very dry.

My question is: Can I use simple untreated 2x4 for the sill plate of the walls? It's a little cheaper than treated lumber. But, I am wondering if I should ere on the side of caution.


BriBri is offline   Reply With Quote
Old 12-13-2011, 03:39 PM   #2
Join Date: Mar 2011
Location: Ohio
Posts: 1,646
Rewards Points: 1,000

Exception? to using treated sill plate for basement walls

when i was in fla they had to use pressure treated for bottom plates on the concrete but they would also let them use regular 2x4's with felt paper between the 2x4 and the concrete. depends on what the code is in your area.


DannyT is offline   Reply With Quote
Old 12-13-2011, 03:41 PM   #3
Disabled wood vet
titanoman's Avatar
Join Date: Nov 2011
Location: California
Posts: 1,654
Rewards Points: 1,002

Exception? to using treated sill plate for basement walls

Concrete never completely dries from the day it was poured, and untreated lumber will absorb moisture. Don't cut corners here.
titanoman is online now   Reply With Quote
Old 12-13-2011, 05:11 PM   #4
Registered User
Join Date: Mar 2009
Posts: 10,825
Rewards Points: 3,716

Exception? to using treated sill plate for basement walls

Unless you can prove to the Inspector there was a plastic previously installed under the slab; 3. Sills and sleepers on a concrete or masonry slab that is in direct contact with the ground unless separated from such slab by an impervious moisture barrier. From- http://publicecodes.citation.com/ico...9_3_sec017.htm

You also need to caulk the plate/slab joint as it will be the new thermal barrier; http://publicecodes.citation.com/ico...002_par027.htm

Or, just use a poly sill sealer as it will create the air barrier required by code and give a thermal break to your slab/footing/earth from the warmed wall bottom plate. No heat sink. Also a capillary break (without plastic under the slab). Treated lumber is not waterproof (unless graded such) and water will wick through it to your framing; http://www.greenbuildingadvisor.com/...-building-code

Tar paper is more vapor permeable (5-30 perms) the wetter it gets. Composite decking is made with 50% wood pulp, it will mold.

If any ads are present below my answer or words underlined/colored, I do not condone/support/use the product or services listed/linked to, they are there without my consent.
WELCOME to the forums, if I forgot to say it!
Gary in WA is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Looking for a step by step for framing basement walls/2x4's wrong direction/stairs??? xray328 Remodeling 27 06-19-2011 09:50 PM
Replacing Rotten Sill Plate Material Tester Carpentry 6 03-28-2011 09:08 PM
Damaged Sill Plate/ Rim Joist bignateyk Building & Construction 4 04-28-2010 09:09 PM
Rotted Sill Plate and Joists jhawk4ever Building & Construction 2 08-30-2009 09:03 PM
doing up a basment littleparr Building & Construction 7 04-08-2008 09:28 PM

Top of Page | View New Posts