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#3299744 - 07/23/13 12:27 PM Sub-floor got wet. Now bowed.
Pic IN the Casa
14 Point


Registered: 03/18/11
Posts: 9403
Loc: TN

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So the wifey parked a carpet cleaner in my son's room overnight and the dang thing leaked enough to bow the sub-floor. It's about a 1 1/2' diameter and is quite noticable.

I parked about 100lbs of weight on it to 'hopefully' coerce it back into shape while still wet (just wishful thinking).

Without ripping carpet up what else can I do? If it's over a floor joist can I carefully sink a screw through the carpet/pad into it?
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#3299800 - 07/23/13 01:09 PM Re: Sub-floor got wet. Now bowed. [Re: Pic IN the Casa]
Diehard Hunter
CRAMP
12 Point


Registered: 08/01/08
Posts: 6769
Loc: East Tennessee

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Doubt you would pull down the whole area by putting screws into it. If it is OSB sub flooring, you are screwed. You will need to pull the carpet up, cut out the mush, replace the area you cut out, then put the carpet back down. OSB comes apart and swells when it gets wet, and it does not go back when it dries, it stays swelled.
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#3299847 - 07/23/13 02:02 PM Re: Sub-floor got wet. Now bowed. [Re: Diehard Hunter]
Pic IN the Casa
14 Point


Registered: 03/18/11
Posts: 9403
Loc: TN

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That is my fear.
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#3300658 - 07/24/13 10:49 AM Re: Sub-floor got wet. Now bowed. [Re: Pic IN the Casa]
CR500AFX
6 Point


Registered: 08/10/12
Posts: 597
Loc: ANDERSON CO.

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Your joists should be on 24" centers, so there is something to screw to. Leave the 100lbs weight on it but space it off the floor with bricks or something to let air flow. Once dried, use a stud finder to locate the joists and screw right thru the carpet. You can also take a piece of 2x12 and put it between joists right under the spot. Screw it to the joists and screw the subfloor to it. We sometimes do this when a floor gets wet for days and buckles a little before the roof goes on.
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#3300669 - 07/24/13 10:59 AM Re: Sub-floor got wet. Now bowed. [Re: CR500AFX]
EastTNHunter
10 Point


Registered: 03/08/10
Posts: 2861
Loc: Rhea Co., TN

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Unless it is a truss floor system, your joists should be 16" OC. Plywood will often delaminate and swell worse than OSB or, more commonly, Advantech or Sturdifloor. Regardless, Diehard is probably right; you will be best served by cutting out the bad stuff and replacing it, but CR500Ax's suggestion of trying screws cannot hurt, as long as you are going into a joist or blocking that you add.
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#3300847 - 07/24/13 01:55 PM Re: Sub-floor got wet. Now bowed. [Re: CR500AFX]
farmin68
16 Point


Registered: 11/08/03
Posts: 13404
Loc: In a tree clinging to my guns ...

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 Originally Posted By: CR500AFX
Your joists should be on 24" centers,


16" centers are standard. Unless the house is really old, odds are it's 16's.
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#3300860 - 07/24/13 02:10 PM Re: Sub-floor got wet. Now bowed. [Re: farmin68]
Poser
Mud Dauber
16 Point


Registered: 07/28/10
Posts: 12650
Loc: Tennessee

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A friend of mine's 2 year old stuffed the sink drain with paper towels and turned the faucets on, and they stayed on for hours, apparently, while the parents were on the other side of the house. The hardwood floor bowed up chest high in some places. It looks like a freakin' skate park. Estimated damage is about $15k.
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#3301022 - 07/24/13 05:20 PM Re: Sub-floor got wet. Now bowed. [Re: Poser]
CR500AFX
6 Point


Registered: 08/10/12
Posts: 597
Loc: ANDERSON CO.

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Thanks, guys, for pointing out my mistake on the on center joist spacing. That is what happens when you get in a hurry. I hated that he was about to cut his floor when it may not be needed. I have had good luck with Advantech drying out ok after being really wet. It can warp some but generally will allow you to screw it back down after drying. Hope it works out.
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