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Old 04-14-2010, 08:19 AM
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Grizzly Adams Grizzly Adams is offline
 
Join Date: May 2007
Location: Central Alberta
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Quote:
Originally Posted by Enigma View Post
If I may ask...3/4 inch for sure?? Most sub-floors are 5/8 T&G OSB and then anywhere you need tile, another layer of 3/8th's on top of that.
5/8 is adequate, 3/4 is better. You can tell the difference, especially on 19.2 joist centers. Plywood is way more moisture resistant, important if the floor is going to be exposed to the elememts for a while. I've seen 5/8 OSB turn to 1 1/4, after a couple of weeks of rain.
Grizz
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