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wet grinding vs dry grinding concrete

betzgb

Member
Joined
Sep 23, 2013
Messages
5
Placed my order with Armorpoxy for one of the "job on a pallet" systems - Armorpoxy II. The garage is 1400sq ft with lots of "toys" (engines, sea doo, cars, lawn equipment, etc.) to move out to the driveway during my project. I want to do the job right but also minimize garage downtime and minimize the mess. I know I want to use a diamond grind on the floor and plan on renting the 10" Edco SINGLE-DISC CONCRETE FLOOR GRINDER and a hand grinder from the local home depot.

What does everyone recommend when it comes to dry grinding or wet grinding? If I go the dry route, I would hook a dust deputy to my shop vac and buy a dust shroud for the hand grinder. Would I still need to wash things out after a dry grind too just getting less slurry or does a good vacuuming do the trick? Would it make the grinding go faster or slower?

As for wet, seems like it would slow the process as the water acts like a lubricant but it also seems very messy as you power wash the slurry out into the driveway potentially staining the driveway and blasting it all over my precious toys that would be parked just outside the garage doors due to lack of space... Let me know your experiences with both approaches. Thanks!
 
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the gypsy

Well-known member
Joined
Mar 13, 2013
Messages
1,780
Location
Montreal, Quebec, Canada
From experience wet grinding is tricky. As you said before too much water and the grinder does not grind efficiently, but if you can find the right combination it will grind just fine and keep the dust down. As for the slurry a squeegee and a wet/dry vac simplifies cleanup. If you attach a hose to the bottom of the vac. When the vac fills up you can easily send the slurry of the property
 

Shea

Well-known member
Joined
Sep 19, 2012
Messages
2,872
Location
California
Grind dry if you can. The Dust Deputy works well for that. Once done, just shop vac the surface real well and then start the application process.

If you wet grind you will need to wait a minimum of 24-48 hours for the concrete to completely dry. If you don't, you run the risk of moisture vapor creating bubbles in the first coat. Once you introduce water to the concrete prep process you immediately slow the entire operation down in order to allow for moisture to dry out.
 
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