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Advantages of Using KDAT Pressure Treated Lumber

By: Guest Post
Building a deck with KDAT, or Kiln Dried After Treatment, pressure treated lumber.

KDAT, or Kiln Dried After Treatment, pressure treated lumber.

KDAT, or Kiln Dried After Treatment, is pressure treated lumber that has been dried after the preservative has been applied.

Unlike most pressure treated lumber, with is often is delivered still wet with preservative, KDAT lumber can be painted or stained right away, and it resists warping, cupping, and shrinkage.

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Video Transcript


Pressure treated lumber is the way to go when you’re building outside because the lumber is protected from wood rot, decay, and pests—like termites. But KDAT, or Kiln Dried After Treatment, lumber offers some additional advantages.

Freshly treated wood has to dry out before it can be finished with paint or stain, so kiln drying eliminates that wait. Plus, evenly drying the boards in a controlled environment minimizes the natural tendency of treated wood to shrink, cup, and warp.

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4 Comments on “Advantages of Using KDAT Pressure Treated Lumber”

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  • Richard Stockman Says:
    May 26th, 2019 at 7:16 am

    I too am having trouble finding kdat lumber. When we were re-doing our back deck, I studied about kdat. I also went to Home Depot and was told that we couldn’t get it here. So we proceeded to use the regular pressure treated wood and after one year, the handrails are twisted and warped. I will be re-doing the handrails this year and will give kdat one more chance to be able to be found. If not, I will use a poly rail.


  • Official Comment:


    Thomas Boni Says:
    January 3rd, 2019 at 8:22 am

    Hi, Jon,
    TodaysHomeowner.com features home improvement advice from the nationally syndicated TV show “Today’s Homeowner” and its experts.
    We don’t sell construction products on this website, or refer to distributors, but we encourage checking your local home centers for these materials.
    Good luck with your projects!



  • Jon Says:
    January 2nd, 2019 at 6:18 pm

    KDAT pressure treated lumber for decking sounds very desirable. However it seems impossible to source anywhere. Not practical if it’s nowhere to be found. Please provide legitimate sources to buy it from.



  • George Says:
    November 26th, 2018 at 10:09 am

    The person I talked to at the store first on your list here in Tampa as selling kdat lumber didn’t know what it was. He said they had plenty but when he showed it to me it was wet pressure treated. None of the Home Depot stores I have visited here sell kdat lumber or if they do it isn’t listed on their websites.


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Advantages of Using KDAT Pressure Treated Lumber