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Old 03-07-2010, 12:28 PM   #1
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How to make concrete floor flat?


Hi all,

We have asbestos tile in family room removed recently. And plan to put laminate floor or konecto there. But there is one part 3 x 3 inch higher than the other part. How can we make this part on the same level with the other part of this concrete floor. Any tool I need? Thanks a lot.

Any advice appreciated.

Lou

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Old 03-17-2010, 07:47 AM   #2
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How to make concrete floor flat?


If the area isn't too large and hand angle grinder with a diamond cup can do the trick. If you mean the area is just 9 square inches, then a small 4" grinder will work. Harbor Freight has 4" diamond cups for $25 or so, and the grinders are often on sale for $45 at HD or Lowes. HF has them cheaper, but angle grinders are really great for a lot of tasks, and it's worth getting a slightly higher quality one. There is a slight learning curve, so go very slowly with a light touch, too aggressive and you'll cut "smiles" on the floor.

For larger areas use a 9" grinder (about $200 for a name brand - I like Metabo). These kick off a lot of dust, so consider a dust shroud with vacuum and definitely use a breathing mask! We had a client who did a 1,200 ft2 floor, and walls, with one of these. A lot of work but after the epoxy was applied it looked fantastic! So much so that his neighbor and him did the neighbor's garage also.

Here's a typical set up - the stool is optional, but a real back saver if you have a lot of floor to grind...



BTW - Here's the garage that set-up was used in. Sweet huh?



Last edited by AlphaGarage; 03-17-2010 at 07:52 AM.
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Old 03-17-2010, 08:51 AM   #3
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How to make concrete floor flat?


for that little area, we'd use a hammer & chisel,,, grinders're nice & apron stores rent 'em including the dust shroud - at least, most of ours do here in atl
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Old 03-17-2010, 09:13 AM   #4
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How to make concrete floor flat?


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Originally Posted by itsreallyconc View Post
for that little area, we'd use a hammer & chisel,,, grinders're nice & apron stores rent 'em including the dust shroud - at least, most of ours do here in atl

They rent them out here in CA also. I just find that a grinder is so handy to have that every garage should have one - or two
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Old 03-17-2010, 04:35 PM   #5
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How to make concrete floor flat?


we have 12 that work & 2 7" that don't,,, the 4" are usually thrown away
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Old 03-17-2010, 05:46 PM   #6
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How to make concrete floor flat?


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Originally Posted by itsreallyconc View Post
we have 12 that work & 2 7" that don't,,, the 4" are usually thrown away

This might be a call for the Harbor Freight solution. If it is an area just a few square feet, odds are the HF angle grinder will do fine, and if it doesn't they do have that 30 day return/exchange window.

I have used their 4" diamond grinding cup in emergencies, and it's actually quite robust. For $24 (less 20% using the many HF coupons in the back of pretty much every magazine, maybe even "American Quilter") can't go too far wrong.

Madmatrix. Could you post exactly how much area (w, d & h) is involved? A picture would help.
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Old 03-17-2010, 07:38 PM   #7
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How to make concrete floor flat?


How much higher is this area compared to everything else?
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Old 03-19-2010, 06:04 AM   #8
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How to make concrete floor flat?


conc floors're ' low maintenance ',,, no one ever suggests they're ' NO MAINTENANCE ', do they ? the floors in frank lloyd wright's az winter home still look great !

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