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Thread: removing undermount sink from granite

  1. #1

    Default removing undermount sink from granite

    We currently have a kohler black cast iron undermount sink under granite countertops. My husband and I are beginning kitchen remodeling (want to keep the granite but switch the sink for same model but different color). I stopped by the place that installed our granite and sink and they said this is possible about 99% of the time. Have any of you done this? how difficult is this process? i know the sink must be epoxyed to the granite and then we have an undermout kit supporting everything. Is this going to be the nightmare I'm afraid of?

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    It really depends. Often, they're attached with silicon and a bracket or clips.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    San Diego


    I hope it is not epoxied. I can't imagine how epoxy is strong enough to hold the weight. Look for some kind of supports or brackets.

    If this is a kitchen sink, the tough part is getting it out. You probably have to drop it down, then twist and turn such that it can come out through the top.

  4. #4
    Aspiring Old Fart, EE, computer & networking geek Mikey's Avatar
    Join Date
    Nov 2005
    Central Florida


    My Silgranite kitchen sink and bathroom vanity sinks were both attached using the supplied fasteners and Polyseamseal caulk by two different vendors. I think both could be removed by undoing the fasteners and working a thin shim around the edge of the sink. If it were truly epoxied, all bets would be off. LIke Jimbo, I doubt that it's epoxy, and is not likely to be the only means of support. If your supplier says it works 99% of the time, see if he'll put money where his mouth is, and warrant the removal to a) not damage the granite and b) allow the installation of the replacement. Might be worth it to use your checkbook as the primary tool here.
    Last edited by Mikey; 01-06-2008 at 04:48 PM.

  5. #5
    DIY Senior Member construct30's Avatar
    Join Date
    Jun 2007
    NorthWest PA


    Don't expect anyone to guarantee that kind of work on used counter tops. No one wants to be on the hook for that expense when it is based off work done a long time ago by someone else and possibly years of pots and pans hitting it and causing small unseen cracks.


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