Subfloor shouldn't be less than 3/4 inch, and ideally screwed into the joists to avoid squeaking over the long term. 3/4" results in a quieter, more solid floor, and a better base for any tile.
Checking Plywood Subfloor Thickness
First determine if the subfloor is the proper thickness, make sure that the subfloor is installed properly, with no issues that could affect your installation. Subfloor panels and fasteners should be properly placed according the panel manufacturer's specifications. If there are protruding fasteners, squeaks or loose panels, refasten the subfloor to the joists. Then the subfloor should also be clean and free of contaminants such as paint, sealer or drywall compound.
Check the subfloor from below and note the direction of the joists. With the above specs, the flooring should be installed perpendicular to the floor joists. The flooring can be laid parallel to floor joists, but you may need to add a 1/2-inch layer of plywood diagonally or perpendicularly to the joists, or install a brace between the joists.
Bending Luan Wood Video
Installing Luan Wood Video
Cutting and Installing Vinyl Over Luan
Installing Luan Over Subfloor
Laying laminate over Subfloor
Making Tile Flush With Subfloor
Attaching Luan To Subfloor
Working With Luan For Do It Yourselfers
Using Marine Plywood in Kitchens and Baths
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What are the Differences in Marine Grade Plywood
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How to Install Marine Grade Plywood
Installing Marine Grade Plywood for Boat Building
Boat Building Plans Available Online
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