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    curwin's Avatar
    curwin Posts: 2, Reputation: 1
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    #1

    Oct 21, 2007, 06:27 AM
    Floor warped & moisture in crawl space
    I'm building a new home and I covered floor with tarps but me 3/4" tung & groove plywood still got very wet. Its been getting wet for about four weeks now and is warping .Question how can I fix floor after roof is on?


    I also have a lot of moisture in my crawl space because water on floor.Winter is coming and its very damp out.I have a fan and heater in crawl space. Is their anything else I can do to stop moisture damage over winter and spring?
    MOWERMAN2468's Avatar
    MOWERMAN2468 Posts: 3,214, Reputation: 243
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    #2

    Oct 21, 2007, 06:31 AM
    Well, thinking ahead here you will see that the walls are to be erected on top of the subfloor. Which seems to be your 3/4" t&g plywood. And you have to have the walls up to put on the roof. So, as you have it stated here, NO, you could not really truly fix it properly after the roof is on. Perhaps you need to check with your insurance company for water damage, hoping you had construction insurance.
    glavine's Avatar
    glavine Posts: 895, Reputation: 87
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    #3

    Oct 21, 2007, 08:39 AM
    You need to install another 3/4 floor , either on top of the damaged one or remove the bad sheets and replace just them
    bullshooter5's Avatar
    bullshooter5 Posts: 17, Reputation: 5
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    #4

    Oct 21, 2007, 06:45 PM
    Quote Originally Posted by curwin
    I'm building a new home and I covered floor with tarps but me 3/4" tung & groove plywood still got very wet. Its been getting wet for about four weeks now and is warping .Question how can I fix floor after roof is on?


    I also have a lot of moisture in my crawl space because water on floor.Winter is coming and its very damp out.I have a fan and heater in crawl space. Is thier anything else I can do to stop moisture damage over winter and spring?
    ===========================

    OK, so your floor plywood got heavily rained on for four weeks and is obviously soaked from top to bottom. Now, here you come with a heater and start baking your plywood from the crawl space side. Hmmmmmmm... I wonder which was worse. The rain from above or the dry heat from below. You and I would warp too with that combination

    I think you are doing your best but all you can really do is treat the cause, not the effect. Let the plywood acclimate back to it's dry state. The way to approach this predicament is to get out of the crawl space and get your hinder up on the roof deck. Once the roof deck is shingled the standing water should be gone from the crawl space so that you can drag a layer of 6 mil visqueen sheeting over the ground beneath those joists. That should help keep ground moisture in the ground and out of the home environment. Good ventilation and air movement with a fan should help remedy the situation also. Even better, leave access door open until it is dry. If you must heat crawl space don't overdo it. Maybe you need a sump pump for your crawl space.

    I think you mentioned the floor was sheeted with 3/4" plywood. That stuff has been pretty good so far as standing up to lot's of wet dry exposure when a home is constructed. I'm glad you did not use particle board. I wish you well and let's hope the weather cooperates so you get those shingles in place.

    bs5

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