Treated Lumber Question

Discussion in 'Carpentry and Woodworking' started by Boca, Mar 15, 2016.

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  1. Mar 15, 2016 #1

    Boca

    Boca

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    How long do the chemicals (and therefore the hazards) remain in pressure treated lumber that was treated with arsenic and chromium? Does this wood remain forever poisoned or do the chemicals lessen or leach out of the wood over time?
     
  2. Mar 15, 2016 #2

    nealtw

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    CCA is not the normal treatment for wood anymore, in 2003 it changed mostly to just copper.
     
  3. Mar 15, 2016 #3

    slownsteady

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  4. Mar 15, 2016 #4

    nealtw

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    I have built a few raised garden beds, I have lined the top 12" with 6 mil poly and the top coarse is raw cedar.
     
  5. Mar 15, 2016 #5

    Snoonyb

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    Not long enough to curb or affect the rate of infestation prevalent in florida.

    As with the inherent natural resistance which exist in species of wood, it dissipates over time.
     
  6. Mar 15, 2016 #6

    slownsteady

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    I imagine the key to this question is "where does this stuff go?"
     
  7. Mar 15, 2016 #7

    rokosz

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    yup, right back into the ground, or your lawn, or your veggies. Remember too: there are different grades of PT: that rated for ground contact and that not. I haven't checked but I'd bet the ground stuff is good and saturated.
    Lifespan: greatly effected by whether cut-ends are protected. Ever seen old rotted PT -- it usually rots from the middle out -- becaues the manu process pushes the chems _in_ and doesn't get the chems into 100% of the wood. (Maybe there's a grade of PT now that _does_ do 100% -- be nice esp. for 6x6s).
     
  8. Mar 15, 2016 #8

    nealtw

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    It might penetrate if the wood was dry before the treatment but that isn't the case.
     
  9. Sep 10, 2019 #9

    Jimsox

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    E2C6334C-11C9-4752-AD29-8E2DECDB3F6C.jpeg 88CA75C6-7A0E-427B-B34C-8C6BAFD7A042.jpeg D1EC3DBA-1EB8-4464-A7A5-88C843580DCB.jpeg F042F810-BAFA-428A-839C-FB17C15E8FB1.jpeg D2CEED19-A953-41B9-8BEC-2FB5C421134F.jpeg 6058EA73-AF0F-4CF9-B40A-432740AD8A03.png 54D7AA55-D9BC-4EA7-9926-0295A3352C87.jpeg F7CCD32D-2CE6-4549-BF31-3016705AEAF7.jpeg 11A37F4D-B75C-4AF9-AF47-244364A9CBC1.jpeg DCB7B1E8-3E68-40B8-8060-D7AB3CC63885.jpeg What do you think of this fence wood was this way at 6 months and worse now at 1.5 yrs
     
    Last edited by a moderator: Sep 11, 2019
  10. Sep 10, 2019 #10

    Jimsox

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    E822EE4C-D77A-4ED3-864D-14B895DB565F.jpeg 129CCD30-20DC-4269-8D22-18D7687F2D96.jpeg E1769A62-8C53-48E1-883B-D5247D83E29C.jpeg D6579856-8D8F-4625-BE41-C226CA872DA5.jpeg 5273A518-BF48-415F-ADD8-842EBE91180C.jpeg 8457A3D2-0525-4CE8-895B-F4D2A0FCE271.jpeg Bad wood for 1 yr old?
     
    Last edited by a moderator: Sep 11, 2019
  11. Sep 10, 2019 #11

    Snoonyb

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    It's aging treated lumber, enjoy the aesthetics.
     
  12. Sep 10, 2019 #12

    Jimsox

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    No way for 1000’ of this mess
     
  13. Sep 10, 2019 #13

    Jimsox

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    @ $9.00 a linear ft
     
  14. Sep 10, 2019 #14

    Jimsox

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    Falling apart contracting and expanding every time it rains......as much as 2”
     
  15. Sep 10, 2019 #15

    nealtw

    nealtw

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    It looks like wood that is a year out in the weather. I think the knot were there when it was new.
     
  16. Sep 11, 2019 #16

    Jimsox

    Jimsox

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    But it’s coming off the post gate latched fell off... contracting and expanding
     
  17. Sep 11, 2019 #17

    nealtw

    nealtw

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    Now that is not nice.
    [​IMG]
     

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