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CallMeVilla 09-12-2013 10:19 PM

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Not my taste. I'd prefer self leveling concrete for an even surface without aggregate then an acid stain and sealer. If you look at commercial applications of acid staining, the floor is always free of aggregate.

Grinding down to the aggregate is "possible" but will you leave a ridge where it transitions to other parts of the house?

Here is how I like acid stained concrete to look ...

CallMeVilla 09-13-2013 12:32 PM

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Hey Liz, you bet. We had to demo 1400 sq ft of Mexican pavers (ugly and dated) which left ridges of thinset across the surface. The grinder we used (looks like a floor polisher) removed every trace of the thinset and took out pre-existing "humps and bumps." Since we were bringing in marble for the new floor, the tolerance had to be withing 1/8" ... and preferably less. Laser testing after the grinding determined the tolerance to be 1/16"

Two men can handle the machine but there is a trick. One man on the handle can actuate the grinder .... but it tends to take off across the floor! By looping the power cord over the motor, you can allow the machine to track naturally, then pull it back using the cord. A little practce and you can systematically work your way across the entire area ... even along straight walls.

Vacuum frequently to check progress and use an 8' straitedge to check for missed spots.
ALSO -- wear ear plugs and good dust masks because this is NASTY work.

CallMeVilla 09-22-2013 08:28 PM

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TO: Liz ... It took us 1/2 a day to grind the 1400 sq ft which included break time, lunch, and extensive vacuuming. The dust was horrendous and I changed my dust mask at least once an hour. Don't cheap on the junk hospital masks. Get one with a valve. Wear serious ear protection (I use muffs, not just plugs). Wear eye protection to keep dust out of your eyes because concrete dust is caustic.

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