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Thread: porch floor

  1. #1
    Join Date
    Aug 2007

    Default porch floor

    I have heard that if you install T&G over plywood outdoors the wood will rot. I am going to install T&G CVG fir on a covered front porch. The porch has 3/4" plywood installed over 2x8 joist. Why would the wood rot if it is not going to get wet?


  2. #2
    Join Date
    Aug 2007
    Powell River, British Columbia, Canada

    Default Re: porch floor

    Your wood will rot due to condensation between the layers.. There would be no air between the
    different wood.
    I just redid my front porch with Tand G fir. I had to pull plywood off off the old T and G. There
    was alot of rot.
    The original porch was built in 1934. Two layers are never any good.
    The back porch is Tand G and is original. It is open to the rain etc. There is no rot.

    paint stained wretch

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