I'm using the marmoleum adhesive. I'm not worrying about the seams as there are only two of them. The one on the right hand side of the door is 5 in x 3 1/2 ft. I straight edged that seam, taped it tightly together then patterned and scribe fit that as if it was all one piece. I did a little test with Armstrong 761 seam sealer and it dries to a Milky translucent color.
I stopped at the paint store yesterday and they gave me a shot of black colorant. I'm going to mix up a small bottle of the 761 seam sealer and the colorant to make it a dark gray. The seam it will butt together beautifully so it's not like a gap filler. I just want the sealer to be there even though the floor probably isn't going to get washed very often.
I hate the word 'slight gap' when it comes to seams. Some people might consider a credit card a slight gap but that's .030" thick. A heavy duty utility blade is .025" A standard utility knife blade is .018"
If I had one, I'd measure one of those razor blades that painters use. I'd rather see an actual number to go by and I could use my judgment after that.
The piece behind the toilet will be fit and glued separately, so I'm not worried about any seam issues on this job. Glad you brought up that different adhesives will allow or not allow shrinkage to the same degree. I'm betting of someone use an off-the-shelf multi-purpose the shrinkage would be considerably higher than using marmoleums adhesive. I'm not so much worried about the shrinkage because that's either going to happen or not going to happen. The customer fully expects it to be caulked around the perimeter..... And they know it's not going to be a quarter inch wide slather of caulking. It's going to be the tiniest amount that I can apply.
The toe kicks are zero concerned because he's putting new 3/4 inch faces on the toe kicks. I guess at this point my biggest concern will be dropping the material into the adhesive. My brother will be helping me get this piece into place, so there will be two of us observing lineup points as a material gets dropped into the adhesive.
I'm going to do a test fit, sort of a trial run to see if we're going to run into any issues dropping this into the adhesive.
The odd thing is, I have another job to do in linoleum in a similar size bathroom. In this one, the linoleum will be coved.... Sorta.
The current vinyl floor has cove cap installed and has the vinyl installed as if it were base. It's not self-coved. The pieces on the wall we're fit separately. It was done that way last time and yes they want it done this time. Good thing, because if they wanted itself coved, I wouldn't be doing the job.