I started framing a two story addition about a month ago. Since I started this project, it has rained, and rained, and rained, and …………….. rained. My seams in the t&g osb subfloor are starting to swell pretty bad. The day I put the flooring down, it rained, and never dried out enough to put any sealer on the floor (which was my intention in the first place). Normaly, I put down a Thompsons Water Seal on the subfloor, to keep any swelling of the joints occuring, and that has worked well.
My question is, can I sand these seams down with a floor sander? One area is going to be tiled, so I need it to be as level as possible before putting the cement board down. Any ideas on what else I might be able to do to deal with this problem? And are there any more concerns I should be worried about? This floor is constantly water-logged. I am praying that the weather holds out this week so that I can get the trusses set and the roof on.
Thanks
Replies
Had same problem when I was building my house. I sanded the raised seams with a belt sander once they dried out. Areas where I tiled I added another layer of 1/2" ply after the house was closed in, followed by 1/4" backer. One thing I would do over is to go through and add screws to all the joist on either side of the t&g seams after it has really dried out good and you have sanded. You will have squeaks in these areas because of the swelling and delamination along the edges.
Dan
"Life is what happens when you are making other plans." - John Lennon
Before Advantech was available in our area, we used to just go rent a commercial floor sander and we could sand all the joints in a good sized house in about an hour. The best kind to use is the belt type. They are much easier to use than the disc type.
Now comes the questions. How much did you save using OSB rather than plywood? And more importantly - - Was it worth it? You'll 'save' money by never using 'oriented-sh-t-board' again.
Edited 5/31/2004 6:42 pm ET by TR
Under tile, you need another ply of underlayment anyways.
Next time, use Advantech
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