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Thread: anybody ever make concrete countertops?

  1. #1
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    anybody ever make concrete countertops?

    Got a bid back this morning for granite. Almost $4k for my little kitchen, I can't swing that.

    If anybody has advice, I'm all ears.
    "Do, or do not. There is no try."
    -Yoda



  2. #2
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    I've never done it myself, but have seen them do it on several home-improvement tv shows, here's a link to several videos

    Click Here
    Jesus was a Woodworker

  3. #3
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    I made a small one. http://familywoodworking.org/forums/showthread.php?19181-Concrete-Counter-Top

    It was a fun project. But it was just for a utility sink in a bathroom. It's still holding up well with no cracks.

    1) Be ready, it will be heavy.
    2) Make sure to really vibrate the heck out of it to get the airbubbles out. I had some little voids in mine I filled in
    3) Get a real polisher. I used some little disks with an air grinder and it worked out, but if you do something larger, you might need something bigger.
    4) It will probably be thicker than the normal counter, so make sure you figure out how to attach the sink to it before you start.
    5) I used the crack resistant concrete and a lot of iron oxide powder and it worked fine. If you are doing a real kitchen, you might want to check out the special counter top additives.
    Last edited by Brent Dowell; 12-05-2011 at 07:28 PM.
    Programmer - An organism that turns coffee into software.
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  4. #4
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    I knew someone here had done one. Brent, that's right!!
    Take a bunch of pictures and take all of us along on the journey if you decide to do this! Also, for large counters, will the cabinets need to be reinforced?
    Jon

    God and family, the rest is icing on the cake. I'm so far behind, I think I'm in first place!

    Host of the 2015 FAMILY WOODWORKING GATHERING

  5. #5
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    Quote Originally Posted by Jonathan Shively View Post
    Also, for large counters, will the cabinets need to be reinforced?
    My stuff is so over built I'm not remotely concerned with how much weight is on them.

    I can't go thicker than 1-1/4. I have a window that sits really low and the top will be going back to it and act as the jamb, then the casing and jamb extensions on the side will die into the counter top.

    I'm debating whether to pre-cast them, or to pour them in place. I won't be able to polish them well on site without destroying everything else in there. A buddy poured his own a bunch of years ago and his had a bunch of texture, it was kinda cool, but......
    "Do, or do not. There is no try."
    -Yoda



  6. #6
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    but what about your floor under your cabs karl
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  7. #7
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    Mine are pretty much at exactly 2" thick. Overkill I think. You could always do a test run of a 2'x2' slab at 1 1/4 to see how it works for you.

    After polishing with the diamond pads and putting a coat of gloss poly on mine, they have a similar texture to the silestone we have in the kitchen. The different rock grits give it a very interesting appearance. I actually really like the way it looks and turned out, even if it spends all it's time as just a slop sink counter.



    Quote Originally Posted by Karl Brogger View Post
    My stuff is so over built I'm not remotely concerned with how much weight is on them.

    I can't go thicker than 1-1/4. I have a window that sits really low and the top will be going back to it and act as the jamb, then the casing and jamb extensions on the side will die into the counter top.

    I'm debating whether to pre-cast them, or to pour them in place. I won't be able to polish them well on site without destroying everything else in there. A buddy poured his own a bunch of years ago and his had a bunch of texture, it was kinda cool, but......
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  8. #8
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    Karl, could I make a suggestion? How about large granite tiles? With almost no seam/grout line, they look beautiful for a fraction of the cost.
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  9. #9
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    Quote Originally Posted by Cynthia White View Post
    Karl, could I make a suggestion? How about large granite tiles? With almost no seam/grout line, they look beautiful for a fraction of the cost.
    Interesting idea, pour the concrete countertop and press the large granite tiles into it? Interesting.
    Jon

    God and family, the rest is icing on the cake. I'm so far behind, I think I'm in first place!

    Host of the 2015 FAMILY WOODWORKING GATHERING

  10. #10
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    Jonathan, no. I mean no concrete, but a granite tile counter. It doesn't look like tile--it looks like granite because the tiles are big and you have almost zero grout line.
    AKA Young Grasshopper Woodworker
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