Sounds to me like a total DO OVER with someone who knows what they are doing. Rarely is a linear drain centered. .........and a shower floor needs a pitch to that drain.

You need a waterproofing issue because the bath is second floor??? What the heck does that have to do with anything?

Sorry I meant the drain is not centered between the curb and the wall. I have a 32 inch linear drain in a 36 inch shower (as shown in my picture) and he put in a drain which makes the tray of the linear drain to one side....in order to move the drain by a few inches he has to re-waterproof the shower pan - hope this helps?

Why do I see raw OSB in that niche? I also see purple drywall, that is not in the shower is it? The floor needs to all come up, floors do not get repaired they get redone in it's entirety and that will include the lower wall tile so the tie in is correctly done.

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Should have been tested for good drainage before he so much as opened a box of tile. For all we know, he should have used an adjustable linear drain.,,,,or you have a high GPM on a two inch drain, that needed a three inch.

There's no way of knowing in a picture.

What did he use to cover the board and tape in the shower?

That is complete fubar. All redone, with a different contractor.

Most linear drains are cut to size on site so unsure why it can not be cut down to balance?

"Channel and strainer shall be cut to length on-site for proper fit in custom applications"

This from Home Depot.

Get the right person to do the do over and not the guy who did this. BTW it does not what floor it is on the waterproofing needs to be perfect.

Channel drains are not cut to size. They channel body has to fit the grate, which is a constrained size. They come in a multitude of fixed sizes, so that there are many options. HD having anything to do with something technical is a laugh. https://www.schluter.com/schluter-us/en_US/Shower-System/Drains/Shower-Drains/Schluter%C2%AE-KERDI-LINE/p/KERDI_LINE

Thank you everyone for your input. I want to clarify as I might not have been clear initially or in my follow up comment.

The floor is not changing as we like the tiles so they are showing installed.

The purple area is from pulling out the bathtub and is sheet rock (not part of the shower area) and will need painting eventually.

The shower area has been already waterproofed with some form of epoxy (I dont know what exactly) but it is not the Orange board that we get in the store - it is 2 coats of a strong smelling solution - that is what yo uare seeing in my picture - that the waterproofing has been done already on. The niche has not been waterproofed (maybe because the actual purple box is already waterproof? I dont know)

The drain was in the center - the plumber moved it to one side as I wanted to install a linear drain - you see the actual drain hole to the left of the sunlight in the picture above. The plumber did not move it in the center so that the linear drain would be equidistant from the wall and the curb hence the need to remove the water proofing, move the drain shown to the center and then re-water proof it. After he does that (and it should look like it does again above), my contractor will pour concrete over it and then tile it.

My concerns were 2 fold:

1. Is it ok to be using this water proofing method vs. the orange boards I see in the store?

2. If yes, when he re-waterproofs it should I worry about any leakages incase he only does a redo on the drain area?

Hope this helps and apologies if I did not explain well - I am not technical at all and really worried that the GC may not be doing the right thing, hence reaching out to you experts.

Thank you again for all your help!

cpartist, If you mean the white covering of the wall and floors, in the photo, I am not sure what he used to cover but it smelled a lot for 2 days!!

I would ask him what he used.

and really worried that the GC may not be doing the right thing, hence reaching out to you experts.

I would be too. That niche should have been waterproofed when the rest of the shower was.