Type of concrete behind the tiles

robmaxfli

Well-known member
May 21, 2009
82
hi - I got some falling tiles at the top of the tile line and behind them are large missing pieces of concrete that the tile would ideally stick onto. I bought some hydralic concrete to fill in these large gaps but not sure if this is the right product to use. Can you advise if this is correct? thanks
Here are some pics
 

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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
10,528
Northern NJ
Buildup is mortar bed, waterproofing, thinset, tile.

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