Storypost | 2009.03.22

Concrete staining grinder surface prep

We left off with our heroes needing to remove some thin set. This called for a terrazo grinder, readily available from Sunbelt and not Clairemont Equipment. While I slaved away at a keyboard, dad and Jon took care of the downstairs concrete. Not to worry, I partook after they headed back to the Bay.

Renovation polished concrete preparation grinder garage

I couldn't let the familials have all the grinding fun, so I sqeezed some in by moonlight. Then I spent some serious time doing edges and missed spots with the angle grinder.

Renovation polished concrete preparation grinder wash

And that took care of the most important room in the house. It went quickly and easily because I was able to run a hose to the grinder. This eliminated the most infuriating part of the process, concrete dust.
As such, I can say that polished concrete is kind of a pain to do in a house, but for patios, driveways, and the like - no problem.

Renovation polished concrete preparation materials

So this left my garage a powdery white, both from the exfoliated concrete and thin layer of dust. I stopped by Concrete Solutions, which seemed to be the only reputable game in town. The rep there was pretty helpful and I got to take home chemicals with cool dangerous labels on them.

The stain, sealer, and urethane (I guess I need them all) ran just north of $600 for what I generously estimated to be 1000 sq. ft. That's pretty good as far as flooring goes, even when you factor in a few throw rugs and the grinder rental.

Renovation polished concrete stain closeup

I tested the stuff in a remote corner of the garage, apparently when sealed it appears as it does when wet. It's got a nice variation, looks fluid from an angle, and has some translucency, though that might disappear with multiple applications.

Renovation polished concrete acid stain inside house hallway

Tonight I went after the downstairs section. The process was simple:
Most enjoyably, after I was finished, the only unlocked entrances to my house were the garage door and lower back door. It was the first time since age six I had to maneuver myself around an acid trap in order to reach the stairs.



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