It all depends on how you install it. You can have additional supports for an undermount. I'm gonna use Sink Setter for my undermount when I finally get my sink.

Basically, it's an adjustable support bracket for undermount sinks. I like it because it give me the option of removing my expensive sink without having to dismantle any cabinet bases.

They're available on Amazon.com. I'm pretty sure they could work with concrete countertops. It rests on the wood cabinet carcass so it should be able to take the weight of a granite sink. You basically have to variations, front to back installation or side to side installation. Pretty good reviews on Amazon.

I'm planning on using 45 inch Kohler Stages stainless steel sink. Saving up right now just for that.

This whole "too heavy" business is a frustrating thing to encounter. Because there are ways of being creative with problem solving on the job. There must be a way the contractor can meet the client's needs without falling back on their old ways.

The sink should come with mounting hardware for undermount installation (if it's designed for undermount).

Here is a pdf of the installation guide for a Blanco granite sink.

Also, here's some more info on installation with adhesives. Source: here.

"Using these undermount kits for installing stainless and ceramic sinks in countertop applications has been around for quite awhile.

Whether its a Corian, Granite or Quartz countertop like Silestone- they provide a quick and easy way to bond a mechanical fasteneing device to the underside of the countertop.

There are many ways to accomplish the bond using different types of glue but as a general rule, the application and preperation process are importantl keys to success whichever adhesive you choose.

I would reccomend a toughened acrylic or a fast curing epoxy that will provide impact resistance if you happen to bump the post after it is bonded to the surface. Many fabricators simply use the seaming adhesive itself and this is a great option as well.

When bonding to Natural stones like granite, be sure to remove the contamination left from the quarrying process on the back of the slab. This is best done by grinding down to the meat of the stone and then cleaning away all the dust and slurry that can be imbedded in the rough underside of the slab. If you fail to do this, any bond you do create will be extremly suseptible to failure. Even on Solid Surfaces like Corian, removing contaminants and increasing the surface area by way of abrasion (sanding) will greatly improve the ultimate bond strength. These general guidelines and can be applied in many situations if you want to increase the overall strrength of almost any bond."

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Undermount Fastener Instructions Source: here.


Using GW 4300 All Purpose Structural Adhesives
when Bonding Undermount Fasteners



When properly applied, GW 4300 All Purpose Structural Adhesive provides impact resistant bonds to Natural Stone, Quartz and Solid Surfaces

The following instructions will help ensure that you achieve the highest possible bond strength and performance when using GW 4300 All Purpose Structural Adhesive to fasten a bolt in an undermount application.

Natural Stone-Area Preparation

It is critical that the area for bonding be free of moisture and any remaining slurry left from the quarrying process. For Natural Stone applications, a diamond cup wheel can be used to grind the area that you are going to bond to. It is not enough to simply wipe away dust with alcohol or acetone. To remove moisture, a weed burner, torch or heat gun may be used on porous stones. A final wipe with acetone or denatured alcohol will ensure a clean surface and the best performance.

Solid Surface, Quartz and Composites-Area Preparation

The area for bonding must be free of moisture and any other contamination. To increase adhesion, scuff the area with a medium grit paper before cleaning with acetone or denatured alcohol. Always ensure that the area is clean before proceeding.




Step by Step- Cartridges (w/ Mixing Tip)

1. Once the area has been properly prepped and is free of contaminants, dust, moisture etc. Wipe clean with acetone or denatured alcohol and let dry completely. For Natural stone, grinding with diamonds will greatly increase the bond strength.

2. Mark the placement of the bonding fastener with a pencil or marker



3. Place the 400ml or 50ml cartridge in the appropriate dispensing gun, purge a small amount of glue into a disposable container and then attach the mixing nozzle.

4. Apply approximately 5-10mls of glue to the area outlined ensuring that you completely cover your marks. There should be enough glue to allow significant flow up through the holes in the base plate of the fastener while gently pushing it into the glue.





5. You can further increase bond strength by smoothing over the glue, fully encapsulating the base plate. Allow to cure 15-20 minutes before applying any force.



Step by Step-50ml and Plunger( No Mixing Tip)

1. Once the area has been properly prepped and is free of contaminants, dust, moisture etc. Wipe clean with acetone or denatured alcohol and let dry completely. For Natural stone, grinding with diamonds will greatly increase the bond strength.

2. Mark the placement of the bonding fastener with a pencil or marker
3. Remove the cap from the 50ml cartridge and use the plunger to displace roughly half of the cartridge into a disposable cup. This should provide enough glue to bond approximately 4 clips.

4. Using a popsicle stick, stir the glue for 20-30 seconds to ensure a good mix of the two components.



5. Apply approximately 5-10mls of glue to the area outlined ensuring that you completely cover your marks. There should be enough glue to allow significant flow up through the holes in the base plate of the fastener while gently pushing it into the glue.



6. You can further increase bond strength by smoothing over the glue, fully encapsulating the base plate. Allow to cure 15-20 minutes before applying any force.

This post has been edited by OneMoreDay: Oct 2 2014, 04:18 AM

Just to add, I've asked the Sink Setter dealer in America if the Sink Setter is compatible with granite sinks (since they only advertise it for stainless steel and cast iron sinks).

The reply I got was that it was compatible for some, not for others. He didn't specify which.

In any case, it's not impossible to create your own support system with a bit of ingenuity.

Still saving up for our dream sink.

Kohler 45" Stages Stainless Steel





We're saving up for those faucets too.

@bengang13

Gastronomic Surgery

I like the size and depth. There's actually a shorter version (36") but I might as well go for the larger one to go on the kitchen island. The accessories come with the sink. Even has a storage rack specifically for these accessories as seen below.



Yeah, pricing is pretty steep. This sink range and the faucet model (Kohler Karbon Articulating Faucet) is specifically for N.American/European markets. You have to special order from the local Kohler dealer. Funny enough, the main dealer was unresponsive to my queries about these items. I had to look for another dealer who connected me to the Sarawak dealer (there is no dealer in Sabah) and gave me a quotation.

But since this is our forever home, we're willing to splurge a bit.

This post has been edited by OneMoreDay: Oct 3 2014, 05:10 PM

TB?

Thanks,