To avoid these ads, REGISTER NOW!

check before you rent a grinder!

Joined
Oct 20, 2016
Messages
5
I've been skulking around this forum for a few weeks now, researching different brands / types & methods of prepping for epoxying my garage. I hadn't noticed any threads mentioning the cost of hiring out the job of grinding a floor, and I had almost made my mind up to rent the diama-brush & buy a small grinder, & special bags for my shop vac, when I decided to call a local vendor just to see what they charged to do the job.

My garage is just under 500 sq feet, and the concrete is 30+ years old, with all the stains & scuffs that entails. I called a local, licensed grinder, who said prepping for epoxy was no big deal for his company (they specialize in flattening concrete slabs). Cost? His minimum charge, 2hrs, $280. They used a big grinder (3 heads) for the body of the floor, and a smaller 9" single-head machine to do the edges. Both machines were hooked up to an industrial vac when they were running, so dust was minimal, and they vacuumed the whole floor at the end, so no mess at all.

I'm all about doing things myself, but i don't think it would really save anything to do that job myself.

I'm in a major city (phoenix), so labor is generally pretty reasonable - ymmv if you're in the sticks, but definitely worth it to call & check before going too far on your own.

Fwiw, I've etched concrete with acid before & after seeing a ground-surface in person, I think it would take a *lot* of acid to etch to the same level.
 
To avoid these ads, REGISTER NOW!

machsnell

Well-known member
Joined
Jun 12, 2010
Messages
942
Location
Northern Virginia
I am glad you said it. I do everything myself within reason but the grinding horrors with the home Depot buffer and dimabrush sound awful. I know a real grinder would make quick work of it. I will be checking for some quotes. Good post

Sent from my SM-G900V using Tapatalk
 
To avoid these ads, REGISTER NOW!

Armorpoxy

Well-known member
Joined
Aug 18, 2013
Messages
3,731
Location
NJ
Grinding is often the toughest part of the project. We own a separate concrete surface prep company that has a fleet of grinders, and the equipment we use generally can't be rented. A professional grinding company can make short order of a project, plus they should carry all different kinds of diamond tooling pads that can be put on the grinders depending on the hardness and surface texture.
 

JonnyC

Well-known member
Joined
Jun 12, 2013
Messages
372
Location
Green Bay, WI
Good point. I just coated the back section (170 sq/ft) of my garage with Rust Bullet and used a Diamabrush with shroud and shop vac with bags. While it didn't take too long, I had two bags blow out and had to stop 6 times or so to clean the filter even when the bags were working.

For the rest of the two car garage I'm going to see how much a company would charge to come out and do the grinding and also skim coat it. It has a lot of spalling and I'm not looking forward to grinding it by hand.
 

LegacyIndustrial

ALLIANCE MEMBER
Joined
Jun 7, 2010
Messages
7,994
Location
deerfield, IL
The local rental houses, especially near a metropolitan area, have much better options for grinders and vac rentals then even 5 years ago.

Rent the biggest most powerful unit you can afford for a quicker, easier prep.
 
To avoid these ads, REGISTER NOW!
Top Bottom