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Discuss Cement Joint uncoupling membrane in the DIY Tiling Forum area at TilersForums.com.

BrianW

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I’ve never laid tile on cement before and am about to tile my enclosed patio (there are no cracks). I’m mot sure how to handle the cement joint. I was told by an area contractor that I don’t need to cover the entire patio with uncoupling membrane. He said to fill the joint with modified mortar and place the membrane over the joint and that would work. Is this correct? Any other guidance would be appreciated. Thx!
 

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BrianW

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chop out the crack to a v shape and refill with the modified morter and you should be fine.
how big is the area? you may need an expantion joint in it.
The patio is approximately 8x15. The small crack is in the expansion joint that was put in when they laid the concrete. The joint is about in the middle of the 15’ length.
 

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