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Concrete Demo without the Tears

geoman | Posted in Construction Techniques on November 25, 2008 03:57am

Hello Breaktime members,

I want to grind down high spots on concrete and adjacent cinderblock, but in a room that is finished except floating floor and trim.  The purpose of the grinding is to prepare for that engineered floating floor.  I thought of using a disc grinder but was cautioned by a home remodeling friend that it would trash my new renovation with heavy dust.  He said just keeping it wet will not be effective.  IS there a power tool and/or method that would not create such a mess with dust, AND will spare me excessive time and physical abuse?    The most I need to cut down is 1/2 inch and 6 inches wide  (foundation block that extends into the floor space).  I can imagine a machine that effectively collects the dust and debris and allows me to cut multiple groves allowing me then to chip pieces off with hammer and chisel.

Thanks!

 

 

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Replies

  1. User avater
    McDesign | Nov 25, 2008 05:18am | #1

    I'd be temped to just chip it all up with an electric roto-hammer.   Make a plywood "shed roof" with sides and a back, about 3' square and 18" high, and move it along with you.  Should catch most flying debris, and create chips more than dust.  Vacuum it out often.

    Get a rotary laser, and outline your high spots with Sharpie first.

    Forrest

  2. ted | Nov 25, 2008 05:28am | #2

    What Mcdesign said, alternately you could make a tent with poly and move the tent as you go along. There is also a product out there that is supposed to be pretty handy. Zipwall.

  3. user-253667 | Nov 25, 2008 05:35am | #3

    Diamond cut blade in my skilsaw.

    GFI plug.

    Little bit'o'water.

    Kerf it.

    Chisel it.

    Maybe/maybe not.

  4. fingers | Nov 25, 2008 05:37am | #4

    I've never used it, but I know Bosch makes a concrete surfacer. Kind of a grinder with a shroud around the grinding part that (I think) hooks up to a vacuum. It might even have a water valve on it to help keep down the dust.

    1. aworkinprogress | Nov 25, 2008 09:27am | #5

      well now, there are several companies that make such equipment specifically for just this task. You might go to rent just such a machine at united rental or you could go for one of the hand held tools from Makita or Bosch There are a host of those products from a company whose catalog is just downstairs. They specialize in just that. Go to Granite City tools They will supply both the grinding cup-blade and tool necessary. If you desire further information then ask me i will get you some phone numbers..

  5. User avater
    Ted W. | Nov 25, 2008 09:33am | #6

    Possibly instead of grinding the high spots, maybe you could fill around them with jif-set. Just a thought.

    If you do, be sure to use Leinwebber's latex and mix it almost as thin as water. Screed it off with a 4' or 6' 2x4.

    See my work at TedsCarpentry.com
    Buy Cheap Tools! BuildersTools.net

    If you haven't already done so, please update your profile. Since many issues are dependant on the region in which you work, we often look at your profile to see where you are writing from.

  6. factotam | Nov 25, 2008 03:54pm | #7

    http://www.toolpusherspecialtytools.com/index.php?main_page=product_info&cPath=107_108_264&products_id=1453View Image

    use a bit like the one above in a roto hammer to take the high spots down a little befow grade and then float it smooth with a floor leveler

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