enclosed porch project

Old 07-08-00, 12:18 PM
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My enclosed back porch currently has vinyl tile that is in pretty bad shape in some spots. I want to put ceramic tile on top of this. Would it be ok to cover the old tile with 3/4" plywood to create a level subflooring. The floor itself is solid, just uneven.
Old 07-08-00, 01:30 PM
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I would use 1/2" cement board instead of plywood. Put it down per the manufacturers recommendations. Check for deflection on the floor. If the deflection is too much, the tile will have a tendency to crack. Tile has good compressive strength and very little tensile strength.

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