Hi there hopefully I’m posting in correct spot I’ll try and get right to the point. House built in 1987 I’ve been here 10 years and redoing the 2nd floor bathroom that was vinyl flooring.
When demoing the vinyl came up with the 1/4 underlayment attached for the most part while some was still adhered to the 1/2 subfloor underneath. I was able to scrap the remaining 1/4” off the 1/2” subfloor.
1/2 subfloor doesn’t appear to be tongue and groove. It’s nailed into joists 16” OC. 1/2 is in ok shape and would be a nightmare to rip up and properly secure back down it’s a small bathroom with a lot of corners and walls build on top of the subfloor.
Here’s my thoughts going to 1 1/2” deck screw the 1/2” subfloor into joists every 6 inches and seams. Do 17/32 or 5/8 on top of that not sure if it should be glued to 1/2 and screwed into joists, or just screwed to the 1/2” itself?Then Ditra and 1/4” tile. Thoughts? Thanks in advance guys