I just had 3 cm quartz countertop installed onto a completely serviceable set of 1979 walnut motif cabinets over a 50 foot x 2.2 foot wide kitchen cabinent run. (The only thing missing compared to today's products is the concealed European hinges/springs - happily I convinced my wife that my old hinges, although a bit old-fashioned, are serviceable, Counter guys came and templated the job putting a joint mid-point at the new composite white sink placement and at one side of the stovetop. The templaters were then the installers a week later. After they prepositioned the 3 pieces of ca. 500 pounds quartz pieces they called my attention to the fact that my cabinents were not level and proposed some "on the fly" leveling with wedges along the entire 50 foot run. Because that effort seemed to me to be unruly amd imprecise, I told them just to minimize discontinuities at the sink and cooktop joints while I wasn't looking. The project turned out great with an almost imperceptable lack of parallelism at the vertical at the front sink joint (This avoided shimming all over the place to correct a 0.5" runout error over the 50 foot run which except to a 0.16" modestly imperfect joint; because it is quartz, one cannot tell much by looking, but the level tells the story with which I easily live with!

I am a fabricator. catheliz - you are right in expecting the 2 corners to be the same. this is a mistake by the fabricator and they seem to be acknowledging it. it's an easy mistake to make. we've done it ourselves. A good fabricator can turn the radiused corner into a 90 degree inside corner. if the edge has a complex shape like Ogee or FV30 it would take an exceptionally good fabricator to make the corner look right. if it a shape like a flat or simple radius then it's very do-able. there will be dust and water but if the fabricator takes adequate care the mess should be contained to a very small area. my 2 cents.

The installer was to come out on Wednesday afternoon to remove the sections as promised, but called later in the day and cancelled - said he would be by thurs, but never showed. My husband called him on thurs. afternoon to track him down, and he said he would be out friday morning - he finally showed on Friday afternoon and took the 2 sections beside the stove and the long run of granite that does not include the sink. The installer stated that he would be back another day to template and cut a new stone - stating that he had enough remnants to cut from the same stone. Today, they loosened the portion with the sink in it to shift it around to try to make it match up with the other granite, just to see how large the gap would become, and when I voiced my concerns about the prying off of the granite with the sink still attached as well as the epoxy integrity the installer seemed to disregard my concerns and said that it wasn't possible - that the epoxy is solid and shifts such as this would have no effect. I have read too many commentaries about issues with under mount sinks in general to think that shifts such as could not play a role in the sink loosening over time. When the installer left, you could feel the tension...and I really feel that the working relationship has been damaged. I will eventually update you on the outcome...but at this point, it may take a while.

It looks like it's already installed? Did you see this done elsewhere or read that it was safe? Has your contractor assured you that it would be supported properly? I would be concerned that the weight would cause it to pull away from the wall creating a crack along the edge, or crack the wall itself - but I'm certainly no expert. I assume they will brace/bracket into studs? I think legs would look fine, but you are probably going for a more contemporary/modern/minimalist vibe and legs would probably lend a more traditional look.