How To Install An Undermount Sink To A Granite Countertop

16 thoughts on “How To Install An Undermount Sink To A Granite Countertop”

  1. Good video. Very helpful. I’m removing Corian that has constantly dirty and stained molded-in Corian sink. Terrible concept but we got it “free” with countertop purchase.

  2. How do you know if the cabinet walls are going to be strong enough to support this? I have Shenandoah cabinets.

  3. Thank you for the video, it gave me new idea to use in my install. BTW someone sell Hercules system on eBay for about $10.

  4. the way we do it at my shop is we have T slots in whatever stone you get, and we mechanically fastened it to the stone using bolts and clips, and with silicone around the rim

  5. I had a quartz composite, under mount sink installed in a new Silestone counter top. Even though the sink manufacturer (Blanco) supplied fasteners and directions for installing them, the installer elected to screw scrap pieces of wood horizontally into the 2 cabinet ends, balance the sink on the wood scraps, apply silicone around the edges of the sink and set the counter top on top of the sink. The resulting sink is not centered in the opening and is also 3/16″ below the counter top bottom surface. Also, since the installer screwed in the wood blocks with drywall screws horizontally into the cabinet sides, the screw heads are not accessible with the sink installed. I have never seen this installation technique used before. I am concerned that I cannot ever remove this sink due to the manner in which it is installed. Do you have any ideas or comments?

  6. I had to remove my sink and need to install I new one.  I have scraped off much of the old Silicone but there is a film.  What would you recommend to clean this off so I can get a good seal to the granite, thank you.

  7. Lgiestas Giestas

    Actually, you do not install anything at all… Just a lot of bla bla bla in an inferior quality video! Modern talk without doing the walk!!!

  8. Interesting and thank you. Any testing done on the strength vs. clips? The weak spot is the cabinet attachment. i should think it would be much stronger if the harness is attached to the stone. Less of a catanary, lots of tension on those screws. Do you bother with a harness when doing a vanity sink? Thanks

  9. Awesome video, thanks! Reinstalling mine after it fell out due to sub-standard mounting clips and poor quality silicone used by original builders. The Hercules Sink Harness looks like a winner – not sure if it’s available in South Africa though – I may have to improvise with something similar.

  10. Hey bud quick question when you go to tighten it down does the sink move and then you have to adjust it as well?

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