Shower tiling using a Delta 500 Acrylic Shower pan

[jcarroca]

Hello,

I am going to tile my bathroom shower. Need some advice since what i am seeing on the internet is quite conflicting. I added Durock just above the shower pan flange. The backer board and the flange are flat so the tile will sit flat against the wall, however, this flange is curved so if the tile goes down to the base there is a little greater than 1/4" gap. So ~ 1.5 of the tile would not be adhered since thinset does not adhere to the acrylic pan. Is this ok, or should i look at somehow gluing the bottom 1.5" tile to the screw flange? Tile in this location will be cut 7" but tile is 12X12. Any advice is much appreciated. I will be redgarding everything but wanted to get this straightened out.

 

[jcarroca]

i am attaching another pic, this is from the Delta 500 classic user install manual. The square box is what i am talking about. My wall board is cemment board not drywall. it looks from the pic they are recommending a gap/void here. Again my concern is adherence of the tile to the 1.5" area. Should i use a adhesive here or silicone. Either way it would be quite a bit of material to fill this gap. This doesnt seem to make sense to me. Anyother options. I thought about gluing membrane at the flange where the screws are then filling it in with thinset for a better base for the tile. Any and all suggestions are welcomed.

Thank you.