Designing Kitchens and Bathrooms - subfloor question
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Mombo
12-18-02, 01:17 AM
Pulled up burgundy carpet. indoor/outdoor carpet under that. pulled it up, found a 44"x88" pc of urine stained rotten 1/4 in plywood. Ripped that up too. Under that is 3/4" presswood, half-rotten and dips and gaps filled in with some type of ceramic type stuff, very hard like rock. Debating on whether to patch bad spots, or for what its worth, pull it up as well and go with a pc of 7/8 think sanded plywood, if there is such a size... advise? (we just bought this place and trying to clean it up)
trinitro
12-18-02, 09:35 AM
I would replace the plywood, but you may not have to if you know exactly where the joists are. Replacing it will eliminate all odors and the chance the floow will squeak. Normally you use 3/4" T&G OSB or plywood as a subfloor. You can leave that and put carpet over it, or if you want to put tile you should install a cement board over the plywood. Use screws only, no nails.
Mike Swearingen
12-19-02, 01:23 AM
If you have rotted and urine-contaminated flooring and subflooring, it would be best to cut it out and replace all of it.
Usually, you have 3/4" subfloor and 5/8" flooring. (No such thing as 7/8" plywood to my knowledge.)
Use a combination of what will make the repaired floor level with the rest of it.
To remove the old stuff, use a circular saw with an old blade (you WILL hit nails), eye protection, crow bar, pry bar, and claw hammer.
Set the blade depth to cut the flooring, not the joists. If there are two layers, cut and remove them one at a time. Cut the flooring out back to the center of the joists beyond the bad part, so that you will have something to screw the new to.
Cut it into smaller pieces (no more than 2' square or so) for easier removal.
Nail or screw 2X supports between the joists where the new plywood will meet the old. Stagger the joints of the subflooring and flooring levels, and put screws every 6" or so.
I use pressure-treated plywood in wet areas (kitchen, baths, laundry, etc.). Untreated is fine anywhere else.
Good Luck!
Mike
Usually, you have 3/4" subfloor and 5/8" flooring. (No such thing as 7/8" plywood to my knowledge.)
Use a combination of what will make the repaired floor level with the rest of it.
To remove the old stuff, use a circular saw with an old blade (you WILL hit nails), eye protection, crow bar, pry bar, and claw hammer.
Set the blade depth to cut the flooring, not the joists. If there are two layers, cut and remove them one at a time. Cut the flooring out back to the center of the joists beyond the bad part, so that you will have something to screw the new to.
Cut it into smaller pieces (no more than 2' square or so) for easier removal.
Nail or screw 2X supports between the joists where the new plywood will meet the old. Stagger the joints of the subflooring and flooring levels, and put screws every 6" or so.
I use pressure-treated plywood in wet areas (kitchen, baths, laundry, etc.). Untreated is fine anywhere else.
Good Luck!
Mike
Mombo
12-19-02, 01:54 AM
thanks.. I appreciate the info, it will help me out alot