Emma3
New Member
We are in the midst of a bathroom remodel and trying to prep the room for our plumber to do the rough-in. We removed the old tub and drum trap assembly, and the vinyl flooring, then salvaged a layer of fir under that for use elsewhere (ok, my husband did all this, but he's out of town so go easy on me ). Anyhow, it turned out that the subfloor under the fir was rather cut up in places, though it feels sound everywhere else, despite how it looks in the attached pics.
Here's what we need to know:
-do we leave the existing subfloor in place and put additional layers over it despite the holes?
-what do we install over it? A layer of ply and then hardibacker? (the new floor will be tile). What grade/thicknesses of each? Screw to joists or to subfloor between joists?
-The new tub is a drop-in style, though it will be installed in a 3-wall application. Should the substrate under the tub be the same as the rest of the floor (hardibacker) or does the mortar bed go on the ply? Does poly go both under and over the mortar? (BTW - I think we're clear on how to install stringers for tub support, just that they are dependent on floor height, so need to address that first).
-Assuming we put ply and/or hardibacker over the existing subfloor, should we cut holes in advance to allow for the drain? How big a hole? Although the basement below is finished, there is an access panel in the ceiling near the drain.
-What happens to the mortar bed in the area of the drain? I assume the drain won't be there yet when the tub is set because they want to set the tub before roughing in any valves. Does that make sense?
That's all I can think of at the moment. Thanks!
Here's what we need to know:
-do we leave the existing subfloor in place and put additional layers over it despite the holes?
-what do we install over it? A layer of ply and then hardibacker? (the new floor will be tile). What grade/thicknesses of each? Screw to joists or to subfloor between joists?
-The new tub is a drop-in style, though it will be installed in a 3-wall application. Should the substrate under the tub be the same as the rest of the floor (hardibacker) or does the mortar bed go on the ply? Does poly go both under and over the mortar? (BTW - I think we're clear on how to install stringers for tub support, just that they are dependent on floor height, so need to address that first).
-Assuming we put ply and/or hardibacker over the existing subfloor, should we cut holes in advance to allow for the drain? How big a hole? Although the basement below is finished, there is an access panel in the ceiling near the drain.
-What happens to the mortar bed in the area of the drain? I assume the drain won't be there yet when the tub is set because they want to set the tub before roughing in any valves. Does that make sense?
That's all I can think of at the moment. Thanks!