Replies

1. 
   USAnigel | Dec 31, 2008 02:17am | #1

   #1  You can undermount a cast iron sink but due to the weight I would support the sink then place the top over it and seal the gap. Best to provide some adjustment to lift the sink a little.

   #2 Your existing sink would be tough to repair as you are only seeing the "tip" of the rust. Which leads us to

   #3. Any cast iron sink can be refinished. Is it worth the cost? If it a rare and beautiful thing maybe. Claw foot tub type thing. Most times all new is way cheaper.

    

1. 
   woodworker57 | Dec 31, 2008 04:02am | #2

   Thanks for the input.  That kinda confirms what I was thinking.  I was thinking I could support the cast iron sink with a small hydraulic jack and raise it into place that way and leave it until the adhesive cured.  What do think?-----WW 57

1. 
   davidmeiland | Dec 31, 2008 04:07am | #3

   An undermounted CI sink needs to be supported by the cabinets. Usually I've done this by either installing ledgers in the sink base or by cutting out the subtop so that the edges are supported. I would not simply glue one in from below.

1. 
   woodworker57 | Dec 31, 2008 05:34am | #6

   Thanks for all the input.  You guys have a world of knowledge and insight.  Thats the beauty of this forum--------WW 57

2. 
   alwaysoverbudget | Dec 31, 2008 04:13am | #4

   middle of the night your going to hear a loud crash and water squirting!

   i don't know of any adhesive that will hold a 100lb cast iron sink for a long duration.

   if the sinks rusty ,it's time for a new sink,with a undermount you are married to that sink till your ready to replace the top,so start with a new one.YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'TMOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THEDUCT TAPE.

3. 
   USAnigel | Dec 31, 2008 06:09am | #7

   WAY too heavy. Stainless sinks come lose so cast iron will for sure!

   I always support the sink with the cabinet. Lots of "glue" area might work but you won't have much area on a sink.

   Jacking the sink up will be very tough to do, again cause of the weight.

1. 
   woodworker57 | Dec 31, 2008 11:49pm | #8

   Thanks for your input, I have changed my plan based on all of the input/info from you guys.-----WW 57

1. 
   USAnigel | Dec 31, 2008 11:54pm | #9

   If you want a colored sink you could use corian under a stone counter. Can be refinished in place.

2. 
   woodworker57 | Jan 01, 2009 04:37am | #11

   Very good idea, Thanks------WW 57

2. 
   pm22 | Dec 31, 2008 04:15am | #5

   Of course, cast iron sinks.

   ~Peter

3. 
   KenHill3 | Jan 01, 2009 02:57am | #10

   Another pitfall of jacking up sinks - if you have a base cabinet with particleboard bottom you run the risk of blowing out that bottom. Been there, done that.