Hi, I recently bought my very first new build home and have experienced loads of issues and I am worried about my investment at this point. The tiling in the bathroom showers was not done by a tiling professional and I have concerns about The future health of what’s behind the tile given that grout is already cracking in several spots. When I had the post billed home inspection, the inspector told me he was 90% certain that there wasn’t a moisture barrier underneath the tile and so I had a contractor come in and rip out a piece of the tile to see what was underneath. What is underneath is hardiebacker board, but absolutely nothing else. And, there was no sealant or moisture barrier put over any of the screws or seams. My question to any of you out there who have experience tiling is: is it industry standard to apply moisture barrier over hardiebacker board. I have read so many conflicting things, but pretty much every contractor has told me that it is currently industry standard to have a membrane of some sort between the tile and the hardiebacker board.