Author Topic: Undermount sinks  (Read 1687 times)

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Offline mrFinpgh

  • Posts: 255
Undermount sinks
« on: December 30, 2017, 03:55 PM »
My undermount sink comes with anchors for the clips.   It looks like those go in with epoxy. 

Do I still use those when I'm installing into a wood countertop?   Seems like the anchors could possibly split something.

Thanks,
Adam

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Offline tjbnwi

  • Posts: 5618
  • Cedar Tucky Indiana
Re: Undermount sinks
« Reply #1 on: December 30, 2017, 04:36 PM »
I don't see an issue with the anchors. Drill, epoxy in place.

Tom

Offline Rob-GB

  • Posts: 1078
Re: Undermount sinks
« Reply #2 on: December 30, 2017, 08:57 PM »
Depends on the anchors and the sink. I had to install an undermount stainless steel sink last summer and used a good silicone caulk  between the sink and oak worktop and wood screws on the anchor clips.
Are the anchors supplied designed for granite/concrete tops? I ask as those are where I'd expect to have to use epoxy.
Rob.
Problem? No such thing! Only a solution waiting to be found:- RJ

"A $2 guppy swims......" Deke

Offline Naildrivingman

  • Posts: 446
Re: Undermount sinks
« Reply #3 on: December 30, 2017, 09:46 PM »
My undermount sink comes with anchors for the clips.   It looks like those go in with epoxy. 

Do I still use those when I'm installing into a wood countertop?   Seems like the anchors could possibly split something.

Thanks,
Adam
You should be fine.  The sealant used around the rim will hold the sink in place. Theoretically you can remove the clips after the sealant cures. Under mount sinks in solid surface and stone tops use no clips.
Dance with who brung ya...

Offline mrFinpgh

  • Posts: 255
Re: Undermount sinks
« Reply #4 on: December 30, 2017, 11:16 PM »
Thanks guys...  this kitchen will be done someday and credit goes this forum for consulting on any number of steps along the way.

I don't know what the intent of the anchors is for -- there isn't any clear indication on the instructions that came with the sink.   I'm not sure whether they would represent an improvement in strength over the walnut, in terms of holding power.  I've always thought that hitting a stud was better than any anchor, but I'm not a pro by any stretch.

I have another related question : The clips I have are about 2 5/8" long.  If I use them on the front of the sink, I'm looking at a minimum setback of something like 5" before the actual hole in the top of the counter.  This is with only a 1" overhang from the front of the cabinet box.   There should be enough space around the rest of the sink for the clips, but the front seems to be a problem.

If I were to screw a narrow strip of wood to the countertop from below, and this strip ran along the front, would that work out or am I missing some variable that would leave me with a sink that separates from the countertop when it has water in it

I also saw the Hercules Universal Sink harness -- looks interesting but I have no idea if that would be any good or not.

Thanks,
Adam


« Last Edit: December 30, 2017, 11:18 PM by mrFinpgh »

Offline tjbnwi

  • Posts: 5618
  • Cedar Tucky Indiana
Re: Undermount sinks
« Reply #5 on: December 30, 2017, 11:28 PM »
As long as you silicone the flange you'll be fine along the front.

You can drill the top and install the clips with screws if you wish. Make sure you triple check the screw length before you run them in the top.

I looked for pictures of how I hold the sinks in place while I working on the install, don't have one.

Can you install the sink prior to installing the top. Always easier with it upside down on the bench.

I recommend Silbond for the silicone.

Tom


Offline mrFinpgh

  • Posts: 255
Re: Undermount sinks
« Reply #6 on: December 31, 2017, 04:25 PM »
As long as you silicone the flange you'll be fine along the front.

You can drill the top and install the clips with screws if you wish. Make sure you triple check the screw length before you run them in the top.

I looked for pictures of how I hold the sinks in place while I working on the install, don't have one.

Can you install the sink prior to installing the top. Always easier with it upside down on the bench.

I recommend Silbond for the silicone.

Tom



Thanks, Tom. And Happy New year.   

Is the silicone you use RTV4500?    I see amazon has it in a 2.8oz package. I would guess I need a

I have the countertop sitting on top of the island but not attached.  I figure I can flip it over to put the sink on, and leave it that way for the plumber to hook up the faucet.  Then we can flip it back onto the island together :-)

Thanks,
Adam
 




Offline tjbnwi

  • Posts: 5618
  • Cedar Tucky Indiana
Re: Undermount sinks
« Reply #7 on: December 31, 2017, 04:32 PM »
Yes, the 4500 is food grade and never cures completely.

Again, check screw length for the clips.

Tom