Was this fabricator licensed as required by your state? Far from precision cutting. A 16th of an inch is an industry accepted tolerance bout that edge seam is a tad more than 1/16th. Surprised you haven't noticed how uneven the cut is around the sink and badly finished the edge detail is. Was this supposed to be polished?

Thanks for the response.

Cabinetix, which edge detail are your referring to? the one that runs along the window?

I am not sure about the polishing, we never talked about it.

The edge detail where the drop meets the top. Should be evenly mitered and polished.

"The countertop people are saying that 1/16" of such imperfections are acceptable. They are saying that the countertop settled after the installation because of the soft top? (plywood) and it's something beyond their control."

If they said this they are lying.

The "settling" excuse only works when a perfectly good seam fails. The seam should be leveled then set in place with adhesive. If you're off when you set, you're off when you're finished. You'll know in about 15 minutes which is how long most adhesives take to kick.

Here's a saw-cut seam I did on a retrofit this afternoon. There is no lippage because I shoved a shim under the stone to eliminate it. I didn't have the luxury of templates, of a CNC machine, a Seam Phantom, just a guy with a grinder.

He nailed the color match, but more importantly than installation skills, he needs to practice gauging the sophistication level of his customers. He really missed that.

Bargain for a big discount, please. A do-over is going to be very painful.

Sorry, but I can't help myself, how is your sink attached?

Joseph, thanks for the input.

I wasn't sure how the sink was attached, so I looked underneath the sink. Basically, they have cutout the plywood and put the sink on top of the plywood, and then laid the quartz on top.

Below are some pictures I took from under the sink.

The screws are puzzling.

It looks like the sink might have a bracket for screwing up into the rough top. The additional plywood panel, which appears to have come unscrewed, looks to be for appearances. Do you have the spec sheet for the sink? It will give you the acceptable installation methods.

Joseph - Other than the screws is this an acceptable method to secure a sink, or do you always need straps or clips? I ask because this is the same way my sink is attached and it seems very sturdy to me but I sometimes think about what happens if I have to replace the sink down the road.

It is a fine enough method, probably regional (out west where they build up 2cm), and is going to make sink replacement more complicated, but doable without pulling the tops.