True terrazzo is just about a lost art. It's formed of marble chips in a cementious base, troweled in place, then ground down to expose the aggregate. If you can buy something preformed with that label,then it's not actual terrazzo. That would be too brittle and heavy to ship without damage. Don't know exactly what it is, or it's wear propeties without reading the specs. True cement based terrazzo should be kept well sealed as it is as porous as any natural stone. If this is a lighter resin based product, that would make sense as being a prefab produced pan.

Thank you all for the informative posts! I think we may need to go "back to the drawing board" and re-think our plan…… Our current home is a fairly well built 20 yr old "spec" home in Boise, Idaho. I think the first thing we need to do is find out what the underlayment or decking is, and if it is substantial enough as-is, or if it will need to be changed. I can see this spiraling out of control quickly! What I had in mind (and I probably used the wrong term) was a pre-fab shower base, which we would have installed by a plumber. My husband would then install the proper cement board and tile the walls. We have had a shower like this in a previous home--although it was a smaller shower, so flexing might not have been much of an issue. We are trying to be budget conscious and also simplify the installation procedure. But we certainly won't take any shortcuts that could lead to issues later. And--the information about "the weight of an average North American user" made me smile!! Thanks again--I'm sure I'll be back with more questions!

I agree, they messed up. However, to fix this would require ripping out the entire thing and this small remodel project has already spanned over three months. We’re ready to be done with the whole experience, not drag it out for another three months. We’ve already negotiated discounts to the final project cost based on issues with the shower, so while I’m not 100% happy with the shower, it is something that we can live with. It’s functional and we realize that our space was challenging to work with. The pan is solid everywhere except this one corner and the water drains properly. The entire shower enclosure was a sloppy install from a cosmetic standpoint, there is no way that I would want the same plumber to redo it. We are very happy with how the rest of the bathroom turned out, the shower is the only problematic area. It’s annoying but not worth the hassle of forcing the contractor to rip it all out and start over, especially if we can level the threshold enough to install the shower door. All of the weight is supported by the walls and crossbar, I just need a level surface to rest the skinny little threshold piece on top of to guide the doors and have them open/close properly.

Ames011. I am sorry we are having to deal with other issues other than your home. I will address the concerns you are having wih the "crooked" tile and the corner gap. 1) Either the tub or the tile is not level. If that is a new tub then the tub should be level, sides and back. The tub is configured with a factory pitch to the drain, therefore there is no need for the installer to assign a pitch. The tile regardless of the tub level should always be level. The first course the tub should be an almost full tile. NOT A SLIVER as pictured. I pay the most attention to this course as they are the most dynamically challenged with watershed. Water flowing down the wall has to stop at the wall/tub juncture and change direction from vertical to horizontal flow. This is the potential for water penetration. I fit the tile with a maximum 1/16" at the tub and join with CR Laurence silicone caulk. NOT big box caulk. 2) I believe the tile has not been grouted. If not, the corner gap is appropriate assuming it is the same grout spacing as the field tile. If the remaining tile does not have a respectable grout space, then there an issue. Tiles with no grout joints will draw water and will need to be caulked as a fix. Tiles can be removed successfully, usually within 24 hrs of install, and replaced with a correct placement.