Building Material

Discussion in 'Coop & Run - Design, Construction, & Maintenance' started by DougCarter, Oct 12, 2016.

  1. DougCarter

    DougCarter New Egg

    Oct 11, 2016
    Bovina, MS
    I was wanting to know if there is any validity to the belief that you should not use treated lumber in the construction of a coop. I was told the chemicals used in treating the lumber, heavy metals, ECT is bad for the birds. Any thoughts or advice?
  2. redsoxs

    redsoxs Chicken Obsessed

    Jul 17, 2011
    North Central Kansas
  3. tmarsh83

    tmarsh83 Chillin' With My Peeps

    Oct 16, 2015
    Modern treated lumber is nothing like treated lumber of even twenty years ago.

    Use it.
  4. Howard E

    Howard E Chillin' With My Peeps

    Feb 18, 2016
    There is treated lumber, and then again, there is treated lumber.

    The old stuff that is now banned and almost impossible for consumers to buy was CCA, short for Chromium-Copper-Arsenic, the latter being a pretty potent poison, or so some think. So the EPA banned it for almost all consumer related uses, so while you may be able to buy it, you won't get it from a box store.

    The new stuff you will likely find is MCA, which is Micronized Copper Azole. Basically, microscopic copper dust is mixed with water and injected into the wood under high pressure. The azole is a fungicide. So the EPA says you can walk around on this stuff in your bare feet and no harm will come to you. Keep in mind it can be left exposed to weather and will resist rotting, but not if it is in contact with the ground, or buried below ground. Not rated for those at all.

    I used the new MCA stuff in my coop and never thought twice about it. I used the CCA stuff for my ground contact runners and never thought twice about it.

    There was an intermediary treatment called MCQ. It also worked, but for some reason, was highly corrosive to metals. Just about anything short of stainless steel that touched it rusted out and did so very quickly. It was a total train wreck, so look at the sticker and DON'T buy MCQ.

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