mortar bed

I have read in these forums various materials used to decouple the mortar bed from the OSB subfloor, but I question its purpose. If the shower pan is being screwed into the studs it makes sense, but the Dreamline shower pan I am using does not. It seems to me that I would WANT the mortar to...

We are in the process of installing a DXV Freestanding bathtub. The instructions say to apply a 3/8" bead of Liquid Nails to the bottom of the tub to adhere it to the floor. The tub is not yet glued down. It feels a little rocky. The floor is flat but if I push down on one side, the other side...

First post! I just redid the bathroom in my 1925 house, and am unsure how to secure my toilet flange. Under the tile is about 3" of dry pack deck mud, then a 4" slab of concrete. The drain is 4" PVC, cut level with the floor. I am worried the dry pack won't hold a tapcon, and I'm concerned a...