​​​​​​Long time since I posted. I have a question for anyone who may have run into this. I started to install a horizontal stainless Moen grab bar on a tiled shower wall and found nails 16 inches apart with a strong magnet above and below the spot where the person wants the bar. I have not done this job before but read up on it. I run a piece of painters tape vertically down the two up and down nails to mark between where the mounting spot is. Since there is what I think are studs right there I drill holes with a small tile bit for the stainless screws but find when I get through the tile and whatever the tile is attached to the bit just falls through and there is a gap before I hit any wood. Maybe an inch or more. It appears the tile is not attached directly to the wall studs on both adjacent studs where the ends of the 16 inch grab bar was to be attached. Is that possible? The house was built in the 40s but I have no idea when the shower tile was put in. If I proceed and drill into the wood recessed behind the tile and screw the bar on won't it crack the tile? Is it possible to put an adhesive between the grab bar flange and then just snug up the screws and after the glue sets up that would be strong enough for safety? Got a problem here. Thanks.

I've got to tile my stepson's bath rm floor this week. I can't remember when/where you need modified thinset and where you don't. I know to set the cement board in thinset and then of course you use it to set the tiles. Do you use modified both places? unmodified is a good bit cheaper per bag. Is one bag enough or do I need to get 2? Small bath rm, less than 50 sq ft.