They make precast shower bases that are pitched to one direction. But note that the edge of the base is level.

He can not lower the floor within the shower? You need a floor pitch about 1/4 " for every foot to ensure drainage.

Hi, plywood is down and resting in the joists how can it be lowered?

What ?? Awet room why . There is no way a FS tub and a shower fit in that space . Post a to scale floor plan and no tile says safe for shower floors , floors yes . IMO if you insist on this really bad plan if I was the contractor I would say good bye

The joists get a "haircut".....literally.

When cutting is necessary ( there ARE videos.

It's not usually the first choice, check local codes, but it sounds like you have now, a subfloor level WITH the original joists, and no way to account for using a thicker than normal tile

• If the shower needs to be located over the joists and there is not enough space to recess the pan, cutting is the only option.
• Before you begin, determine the total required drop by adding the thickness of the pre-slope, the final tile, and the mortar bed.
• For a 2x12 joist, you can cut a maximum of 2 inches (1/6 of the depth).

This video explains how to cut down floor joists for a curbless entry shower:

How to cut and reinforce joists

• Cut the joists to the required depth to create the drop for the shower floor.
• Reinforce the cut joists by "sistering" new, smaller joists to their sides.
• Ensure the new joists are properly sized to hold the weight of the new shower.
• Install a new subfloor that is flush with the tops of the original joists.

I guess you did not read my last sentence before I abandon this plan.

Thanks Jan Moyer. It does sound like I lot. Will move onto plan b

The real point? You have to want it badly: ) and at 6' x 7'.....a generous shower, but not generous enough perhaps to be "a good wet room"

If there was such a thing.....: (

Perhaps show the entire bath plan. Not everything on the internet is truly great.

and.............

you

can use large format terrazzo on a shower floor, provided you take key precautions regarding slip resistance and proper installation. Terrazzo is a durable and moisture-resistant material, making it suitable for wet areas when correctly specified and installed.

• Choose a Honed or Textured Finish: Polished terrazzo is very slippery when wet and should not be used on a shower floor. A honed, matte, or textured finish provides the necessary grip to prevent slips and falls.
• Ensure Proper Slope and Drainage: Large format tiles are less flexible than smaller tiles and can make achieving the correct slope for drainage challenging, especially with a standard center drain.
• Linear drains are often the recommended choice for large format tiles because they allow for a single, consistent plane of slope, which makes proper water drainage easier to achieve.
• For a traditional center drain, a highly skilled installer will be needed to ensure the floor is properly pitched to the drain to avoid water pooling.
• Professional Installation is Crucial: The installation of large format terrazzo in a shower is a specialized job. Improper installation can lead to pooling water, cracking, and moisture issues. Hire a professional installer with experience in this specific application, not a general DIY approach.Sealing: Authentic terrazzo is porous and requires periodic sealing to maintain its water resistance and prevent staining. Terrazzo-look porcelain tiles, on the other hand, are non-porous and do not require sealing.
• Subfloor Preparation: The substrate must be perfectly level, smooth, and structurally sound to prevent the large, heavy tiles from cracking. .............."

Hi, what I want and what makes practical/financial sense are 2 different things. But thanks for taking the time. I know sometimes contractors don’t want to do things because it’s more labor intensive, so was just looking for other opinions.

" Im curious as to why the tile i want cannot be pitched to the edge. "

It certainly can be by an experienced tile setter, done all the time. He is telling you he cannot install this tile, and if you insist he will make a mess, big red flag in my opinion as he is making excuses.

" Hi, plywood is down and resting in the joists how can it be lowered? "

Sure, rip up the plywood and do the floor correctly. You want curbless and a linear drain, the floor joists being lowered is the best method but if he does not know this he is already telling he does not know what he is truly doing, especially coupled with the first quote above.

^^

What he said: ) Except TILE is the least of it, and integrity of shower the most of it.: )

He has not said that it could not be done. We are just at a stage where things would have to be reconfigured. I guess he assumed my tile would be a standard depth. I should have pointed this out earlier. Thanks again.

I used 24x24 porcelain tiles on my bathroom floor with a curbless shower, but I used the matching 2x2 mosaic in the shower, even though everything was sloped towards a rear 60" linear drain. I prefer the mosaic and grout in the shower for a bit more traction.

Since I was building new, the cement slab in the shower is poured 4" lower, so the finished shower floor ends up being at the same level as the bathroom floor.

1. You first of all need to verify that the tile has been physically tested to have the higher .60 or higher DCOF anti slip rating for a large format tile used in a shower.

2. You need an entirely different, actually qualified, tile professional. A 25K+ project like a curbless wetroom is a leaking disaster in the hands of someone who thinks that they can use a PVC liner or anything else other than a high end membraned system for the whole room.

https://www.tile-assn.com/news/405095/Homeowner-Guide-to-Finding-a-Qualified-Tile-Installer-Now-Available-from-the-Ceramic-Tile-Education-.htm

Yes, the tile is appropriate and he would not even consider using a PVC liner on any project.

Just one of those instances, where you decide if the juice is worth the squeeze: )

I'd post the layout were I you, but that is UP to you

I think i have given up on my "really bad plan that could not possible fit a FS tub and shower" would not want my contractor to say "goodbye" but thanks for all the help, to those that did help.