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can you lay concrete over plywood decking

Does anyone out there have any information about how we can do a finished concrete floor on a plywood subfloor with 16" on center joists? Would you have any concern putting the 4x4 wire mesh over the top of the radiant tubing (Already stapled to the floor, as shown in the picture) or would you 

Did you cut any control joints into the surface? Cracks are caused by stress or movement. Just because it is a microtopping over a mortar bed does not mean it will not shrink or move due to stress and temperature. I would not be surprised to see that the crack had followed a seam in the plywood or decking in the sub-floor.

If you take this kind of care with the prep work, the finished tile won't crack over time. Next, cut the This is not my favorite way to install tile, but it can be done, as long as the existing tile and subfloor are in good condition, and the old tile is thoroughly cleaned and scuffed up with sandpaper to allow the new mortar to grip.

Frankly, Stacey, the thought of a concrete-over-wood floor frightens me badly. IF you can determine that your existing framing can carry that much additional "dead load", then definitely rebar and remesh (the mesh) well or it'll crack. You should know that the floor will want at LEAST 2" of thickness, which 

A: (Scott MacHardy) I wouldn't think it a good idea to use any kind of concrete over wood deck materially like that, just because of the rot factor on down the road. . I have been looking at different versions of concrete and am wondering if putting a 1 inch layer of lightweight concrete on the roof using an artistic design is 

Plywood substrates can be resurfaced with self-leveling concrete to create beautiful polished concrete floors using Param 5500 and clear coatings. Install 3.4 galvanized, expanded diamond metal lath mesh to the wood subfloor, stapling approximately 6 inches to prevent the mesh from floating. Overlap adjacent pieces of 

This video demonstrates the installation of self-leveling concrete over plywood substrates.

DIY Network has instructions on how to install a plywood subfloor so that it is level, well-insulated and free of annoying squeaks.

In fact, we just found the pic up top at the Food Network, where Tyler Florence did a concrete floor OVER his upper wood floor (it looks like). Take a Yes, Concrete can be installed over wood. If you THe guy used ardex concrete, which is a self leveling lightweight conrete you mix in a bucket and pour.

Expert tips and recommendations on how to install ceramic tile over existing tile, concrete, wood and/or vinyl floors.

When installing engineered, solid or floating floors that are less than 1/2" thick we highly recommended you add an additional layer of 3/8" or 1/2" thick plywood underlayment. The addtional underlayment should be glued and screwed down over 3/4 inch thick OSB subfloor to add stability. As an alternative you could install 

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