Granite Tile Countertop Underlayment


Old 02-21-08, 11:29 AM
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Granite Tile Countertop Underlayment

I just found a store that sells granite edging for tile countertops. The distance between the bottom of the edging (where it lays on the countertop) and the bottom of the lip is 3/4 inches.

My original plan was to make the underlayment out of 3/4" plywood, however, I've read that a cement board should also be installed. A 3/4" plywood and 1/8" cement board would allow some of the underlayment to be exposed after the granite edging is installed. So, I am planning on using a 5/8" plywood with a 1/8" backer board.

Does anyone know if 5/8" plywood plus 1/8" cement board provide enough rigidity for 3/8" granite tiles?
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Old 02-21-08, 12:45 PM
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Where you gonna get the 1/8" cement board?
Old 02-21-08, 03:27 PM
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Where you gonna get the 1/8" cement board?

Must be a custom order from HD. Gotta be half the price of 1/4" cement board.
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