If you are not happy, replace the countertops and use a material that does not require an add on to look thicker.

Best I've seen? no. As LWO said it is a solid B. I will tell you my waterfall counters have gaps at least that large but my stone is mainly black so it was easier to get it to blend. I think the size of the gap is normal, I wish they had gotten the glue color closer...

(not a pro) "GC is now offering to either waive the cost of the counters or replace them completely." That sounds like the GC agrees with you? In any case, it's a better offer from a GC than most people here seem to get in response to a concern.

I am a fabricator. It's not terrible. Seem could've been much less noticable if the fabricator had used a color matched epoxy. The joint is also wider than I would expect but it might be the best the fabricator could do with his equipment. With state of the art equipment the joint can be a hairline. I am amazed the GC is offering to waive the cost. I'd wager a considerable amount that he is making the fabricator eat it.

GC agrees and is fantastic - I use them on every project. My post was to get some objective viewpoints because after looking at it for a week straight, I've lost perspective on the two options. Faced with an option to just "accept it and move on" as live_wire stated is appealing on one hand because we are several weeks behind schedule (COVID supply chain issues) and without even basic use of the kitchen for 10 weeks now - so the thought of just plowing forward and getting this done is enticing. However, we did pay a premium for an upgraded feature from a reputable and experienced fabricator...having to look at something that is "a solid B" when that isn't what we paid for nor were promised, and doesn't match the quality of the rest of the project will probably irk me to see each time we walk into the kitchen. Again, was looking for some perspective on if this is acceptable or poor from professionals or people with more experience with mitered edges than myself. The chastizing over the inherent pitfalls of renovation and "overdone fad features" really is just white noise - this isn't my first or even 10th reno, but I'm also not a stone fabricator. But then again, who doesn't enjoy armchair quarterbacking other peoples' projects from behind a keyboard? 🙂

Thanks for the helpful replies! GC sent someone to take a final look and made the decision to pull them. Reason given was mitered edges have been around long enough that equipment and techniques should provide a nearly imperceptible seam; the size of the joint, coupled with the lack of tinting in the epoxy made them unacceptable. Going to use a fabricator that uses a CNC saw/jet (vs. a bridge saw), is experienced with tinting epoxy to color match, and will provide a mock-up before cutting the full slabs. Hopefully this thread provides a checklist for others to ask their installer/fabricator when considering mitered edges for a long run of countertop. Thanks again!

Good luck, it’s so frustrating. It’s unfortunate because this person was really close to a good Install- they even aligned the veins!

Yeah, the vein matching was nice. If not for that I would have been all RIP IT OUT NOWWWWwwwwwww!

"Going to use a fabricator that uses a CNC saw/jet (vs. a bridge saw), is experienced with tinting epoxy to color match, and will provide a mock-up before cutting the full slabs."

This is a mistake. You go to the Integra Adhesives website, look up your brand of engineered stone in their chart, then use their recommendation. The color and catalyst/adhesive ratio will be perfect.

Men have colorblindness 16 times as often as women and too much catalyst, common in shops, can cause seam yellowing over time. Both eliminated with Integra methacrylate (not epoxy) dispensed from the proper gun.

The mock-up idea is a good one.

Great to know, Joseph - thanks so much!

This is not acceptable

Acceptable work, sorry for the water on

At least your white epoxy is nice and clean!! I asked for a mitred quartz mantle for my fireplace, and while some parts of the mitred edge have an invisible connection, others are as in my pictures. It is too much of a headache for me to get the entire piece redone as the rest of the fit is excellent to my custom fireplace aurround.

I’m just going to tape the areas off and paint them with white paint.

For future projects, I will definitely specify with the fabricator to clean the edges etc to ensure the white epoxy is applied nicely and would confirm the seam gap measurement as well.