Move toilet 3 feet over concrete slab, building platform
I know there have been many other posts about moving toilets, which have been quite helpful, but I'm posting this to get additional info for my particular project.
The renovation is for a 60"x90" bathroom that currently has an unnecessarily large vanity and the toilet as a focal point. See picture below:
Current Layout:
Inefficient use of space with large vanity and toilet too much of a focal point.
http://farm2.static.flickr.com/1073/...9bbdcf34_o.jpg
I would like to remove and replace the vanity with a smaller 30" vanity and move the toilet 36 inches perpendicular from it's current location. See picture below:
Proposed Layout (Vanity and Toilet installed over platform):
30” wide contemporary vanity with raised bowl, better flow.
http://farm2.static.flickr.com/1264/...34eced84_o.jpg
The subfloor is concrete slab (I live in a 2nd floor condo with neighbor below) and the plumbing is all PVC. Because busting up the concrete is not an option, I would like to build a raised wooden floor to accommodate the new plumbing necessary for this project. I would like the platform to be as low as possible without compromising the integrity of the system. I've seen in other postings that a 1/4" drop per foot of run is required for the pipe. For my project I will be moving the toilet 36" so I guess this means I will need 3/4" of vertical drop from the new flange to the old flange. So far so good. My questions, however, are:
1. Exactly what plumbing fixtures will I need to adapt to the old flange and install a new one? (A detailed list would be great as I will take it to my local plumbing supply store to get the exact items.)
2. How much additional vertical space for the platform height will I need to factor in for those fixtures?
My initial thought was to frame the platform with 1x4's (leaving 3.5 inches between slab and platform) but I'm not sure if that will leave enough room to house the appropriate plumbing fixtures and 3/4" drop.
3. Should I use 1x6's instead (giving me 5.5 inches of space)?
If the platform must be taller than that, I will probably scratch the project as it would then require multiple steps to reach the platform.
Here is a picture of my pre-planning design of the joists to support the platform:
Pre-Planning Design:
Initial thoughts are to use 1x4's (or 1x6's if necessary) to build a frame for the platform spacing the joists approximately 10 inches apart and working around the new piping and plumbing fixtures.
http://farm2.static.flickr.com/1143/...bb661274_o.jpg
Once the platform is built, I plan on tiling over it with expensive limestone tile to make this a permanent installation (meaning the only way to access the new work in the future will be to demo the expensive new platform). So obviously I want to be sure the 3 foot extension is perfect - no leaks or drainage problems.
Thanks in advance for any and all input.
Josh
"Inspired-Do-It-Yourselfer"