questions about barrier free tile shower over concrete slab
my desire is to have an open , barrier free shower area. i will be removing the current cheap plastic shower stall, and hope to use the existing drain. our house is built on a concrete slab. can i use redguard or something similar directly over the concrete floor and tile directly over this or do i need a pan? i would use hardi backer for the walls. please advise the simplest way of doing this. thanks.