Quote:
Originally Posted by VINMAN
The bathroom I'm doing for a customer now, porcelain tile on the floor I'm using 1/2 Hardie over 5/8 ply floor. Ditra between Hardie and tile.
.The Ditra will not eliminate any flex in the floor. You still risk cracking the tile or the grout joints
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Ditra or similar material is a great crack isolater. We no longer set tile directly on top of slab floors but always use a crack isolation membrane or roll Hydroban over it. If not, cheap Red Guard will achieve the same result. Its cheap insurance from movement coming thought the slab causing crack tiles.