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Plywood grade for 1/2 furring/backerboard

Plywood grade for 1/2 furring/backerboard


Old 03-12-02, 09:48 AM
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Join Date: Feb 2002
Location: New York, Long Island
Posts: 101
Plywood grade for 1/2 furring/backerboard

I'm furring out a wall 1/2 inch for my plumbing wall. I need to use part of the plywood as backerboard for a pedistal sink. I'm planning to screw or nail the 1/2 inch plywood to an existing 2x8 which is now being used as the existing backerboard for the sink . I plan to sheetrock over the 1/2 inch plywood with 1/2" sheetrock which will add 1 inch to the existing wall. My question is what kind of plywood grade should I use for this?
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Old 03-12-02, 11:18 AM
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Join Date: Feb 2001
Location: sw VA
Posts: 3,100
You can use any kind of ply, but I would use 'greenboard' for behind a sink. It has a bit more water repellency than sheetrock.
Old 03-12-02, 11:22 AM
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Use a piece of 7/16 OSB [waferboard]. It is cheaper and more stable than 1/2 inch plywood you buy now days. If 7/16 isn't enough, you will have to go to 5/8.

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