A CNC stone shop will be one of the bigger ones in town. Choose the one with the best reputation. You should talk to them in person, with the specification diagram in hand.

Which one you choose may depend on what you’re choosing for your new counters, as they all have different relationships with wholesalers. But the better option is to choose the fabricator that can handle the flush mounting, and choose your stone from their available inventory.

I don’t recommend quartz for flush mounting. It’s too easy to have a pan edge hang over and create a hot spot that can scorch.

What is your countertop material please?

Thank you. It's really nice to hear some tips about this install. I really appreciate it. Looks absolutely beautiful.

Joseph Corlett: It's composite granite. Im worried because I have the prefab granite slabs partially paid & waiting for install.. Now I'm hearing from every fabricator that I shouldn't have bought prefab and no one wants to work with it. I'm really hoping someone will use a cnc machine on prefab slabs. Finding the cnc machine is the first hurdle ( or someone who can do the cut with or without the machine).

By "composite granite" I'm assuming you mean engineered stone. Engineered stone is 66% quartz and 33% plastic. If you use too large a pot or or misplace a proper pot on the appliance and transfer the heat from the pot to the estone, you will have permanent non-repairable damage, particularly with a flush mount cooktop.

If you're insistent, this must be done on a CNC machine. No one is going to be able to cost effectively and accurately freehand this. No one who owns a CNC machine wants to fabricate material they didn't provide and make any money on. Too much risk for too little reward.

You've taken the wrong approach. First, you should have spoken with a reputable fabricator. He would have let you know you shouldn't install a flush cooktop on estone. He would have given you a price for flush mounting your cooktop into a proper material, and providing and installing that material.

If losing your deposit on your prefab is the biggest spanking you get on this one, consider yourself lucky please. That's much less expensive than replacing wrecked tops.

No reputable fabricator touches prefab of any kind. But especially not any who knows what low budget questionably produced produced generic e-stone junk. It’s the equivalent of the street corner bought $100 “Rolex”. No backyard guy who would touch that should ever touch a flush mount.

Find the right fabricator. Buy granite or quartzite through them. No quartz. Or return the Wolf.

"Any advice or assistance?"

Why not just install it the standard way?

Joseph Corlett: Thanks. It appears very few want to work with engineered stone as they're looking for more of a profit in fabricating real stone. Unfortunate, as I have floating hardwood floors, and have been advised not to put heavy stone on top of the cabinets.

Nester44: Did your fabricator cut a recessed area to set the cooktop into or did they cut it like a sink cutout and prop it up with wood or something to make the appliance flush?

"Unfortunate, as I have floating hardwood floors, and have been advised not to put heavy stone on top of the cabinets."

You have been given nonsensical advice.

Oh really? Good to know. I was told it could restrict proper expansion/contraction of the wood, and may split the boards.

Kari, The fabricator made a recessed lip on the granite (see pictures). The installers then laid a thin black foam rubber strip (which was provided by Wolf) around the perimeter on the granite lip. That cushioned the cooktop and helped it to lie perfectly flat. After the cooktop was laid in, the installers sealed around the perimeter with a special heat-resistant sealant (which was also provided by Wolf). The customer service people at Wolf were very helpful in explaining the flush-mount installation to me prior to the actual installation. I'm not sure why you had a bad experience when talking with Wolf.

Thank you nester44! I will reach out to Wolf again.

The only reason you would be concerned about installing stone on a floating floor is if the cabinets are installed on the floating floor. Which they should never be. The fridge, range, dishwasher all go over a floating floor. But not cabinets. The floating floor should be installed around the cabinets with enough space for expansion/contraction. Cabinets are installed directly over nailed or glued product.

Engineered stone weighs about the same as granite so there is no significant difference in any issues caused by the weight of the product.

It sounds as if may not have knowledgeable people assisting you in your install.

Quartz and granite are very similar in weight, rendering the point moot, and rendering everyone else speechless.

Your floating floor should NOT be underneath any of your cabinets, regardless of counter material.

Quartz cannot have this flush mounted. Only natural stone.

You have absolutely no one with any good sense guiding you in this. They are feeding you random BS just to make their job easy and to get out of doing other work.

Nester44- what material did you use to seal around cooktop?

Lana: It was a black RTV sealant that was provided by Wolf. Wolf provided very clear and comprehensive instructions about how to do the flushmount installation and they provided the sealant and other necessary items, which were all included with the cooktop when I bought it. I had a very experienced granite fabricator and a cooktop (appliance) installer who was also experienced with this type of installation.