September 2, 2008, 08:37 PM
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#3
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a Floor Pro
Join Date: May 2006
Location: Bridgton, Maine
Posts: 438
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Re: stone paver install
kathryn- first things first-- what's the thickness of the plywood there? Also, what are the dimensions of your joists? 2x? what's the unsupported length? Mudsetting that thick stone is going to add a whole lot of weight to that floor, and that floor needs to be beefed up considerably to take that extra weight. Additionally, it needs to be twice as stiff as most other floors just because it's natural stone. IF you meet all those requirements, the best bet would be to lay down extruded diamond mesh wire lath, and wet set the stone with brick mortar, using thinset as a bondcoat with a v-notch trowel on the back of the stone.
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