Howdy.
I'm setting Hardiebacker in a bathroom tonight. 1/4" square notch trowel, polymer modified thinset, set the backer board and then nail it down with 1 1/2" galvanized roofing nails. Questions:
- How soon can I work over top of the backer board? I'll end up sitting on top of fresh work to put down new boards. Should I let it set up first or can I keep working? Time permitting, I'd like to go straight to laying out the tile as soon as the boards are in. Or should I wait until tomorrow?
- None of the nail spots on the backer board line up with the floor joists. Is that normal? Should I ignore the pattern and nail into the joists?
(btw: New exterior grade 3/4" plywood, glued and screwed over existing 1/2" plywood. 2x8 joists 16" o.c., 1/4" hardiebacker, 1/4"
6x6 ceramic tile with flexbond thinset.. Hoping this is okay.)
Thanks!