[abarsoom]

First let me thank those in the plumbing forum (Mark thank you) for the good advise proffered. Though they have added to my work, I know it's the right thing to do.

So here's my situation -
- Upstairs bathroom in a 1930's duplex
- will be demoing an old tile floor to replace lead closet line with pvc to cast iron sewer line in wall
- when old tile removed will have 2" from tg subfloor to grade
- being an older building, floor declines 1" over 10' from door to exterior wall

Here's what I was thinking of doing once demo & plumbing are done.
- lay down overlapping roofing tar paper over tg as vapor barrier
- glue & screw 3/4" ply (bc grade) over subfloor
- pour self-leveling concrete to bring closer to level (deepest point would be 1" feathered to 1/4"
- glue & screw 1/4" hardiboard on top of this
- set terrazo tile with thin set

What do you think?

All advice or comments appreciated!

Thanks.

[hkstroud]

Since floor leveling that thick will require the use lath to prevent cracking, my approch would be a little different.
I would build up the lowest end with as much 3/4 plywood as I could, not coming above 1/8" below a level line of the highest point. Then switch to 1/2 plywood, then to 1/4" plywood,

Then pour the self leveling cement. That way the maximum depth of the self leveling would be 1/4".

[mtconc]

I agree w/ harold.. this works well.
I used a piece of wood instead of a line but that's what I had.good luck