Epoxy coated the shop floor...
So, the first thing I wanted to do since getting the space is to epoxy coat the floor while it is still empty. I choose the DIY route versus paying a contractor $2-$3 per square foot. I just couldn't swallow the $1,500 price tag for what is about $400 in tools and materials. However, what I underestimated was the amount of prep work that I would be putting into it, and not to mention, the value of a little experience.
The lower grade Rust-Olem Epoxy |
I got everything from the local Home Depot, no problems there, but was notified of a steep restocking fee on the epoxy (but no worries, I won’t need to return it…I’ve got two boxes of it if anyone needs some). So, time to get started with the grinding. My original thought, and also shared by the guy at Home Depot’s tool rental, was to wet the floor to keep the dust down. This worked perfect….at keeping the dust down, but not so much for the actual grinding. I’m not sure if the water created a lubricating effect on the grinding pads or if the pad itself wasn’t as coarse as it needed to be, but the floor showed almost no change. There where no visual indicators that the floor had been ground, even the paint spots and other stains remained. The result was not going to work for the epoxy. So, I then proceeded to regrind the floor two more times without using water before returning the Floor Maintainer.
As you can see after three passes the floor still shows paint and stains |
After three runs of the Floor Maintainer, disappointingly, the floor is not prepped. The concrete still has paint, adhesive, stain, and areas that appear to be sealed. Next up, paint remover…worked great on the thick painted areas, but not where the paint really soaked into the pores of the concrete. Next, pressure wash…this helped with some of the paint left behind by the stripper, but enough is still left behind to cause concern as to whether the epoxy will properly adhere. Concurrently as I worked on the floor I also did a little research (this site offered a lot of insight http://www.garagejournal.com) to learn that the epoxy I purchased does not contain enough solids to work as expected, but is rather more of a strong paint. So, I upgraded the epoxy to the Rust-Olem’s professional grade which is a high solid epoxy.
The high solids Rust-Oleum Professional Epoxy |
The Dewalt DWE46151 Grinder and Grinding Wheel |
The grinder went amazingly well, wish I started with it. It took a bit longer than I had wished, but wasn’t too bad. The negatives is that it takes about an hour per 100sqft, being on your hand and knees to do it gets tiring quick, after 30min you can’t feel your hands anymore, the grinder builds up static in the concrete which get’s discharged on your hand (gloves help), the grinder will dig into the concrete if it isn’t held flat, and the filter on the shop vacuum gets clogged quick. Now the positives is that a quick swipe over the concrete and the grinder gave the perfect finish, the dust collection kept the dust down, and being on your hands and knees helps you find all of the holes and cracks to fill.
You can see the before and after using the Dewalt grinder |
After about seven hours of grinding (over a few days), the floor is almost there. I circled any holes that needed to be filled with a red grease pencil. Now a little bit on filling the holes and cracks. I choose to use a concrete filler that I already had, Quikrete, which proved to not be a good choice. When I did the previously mentioned power wash, all of the filler was washed out. This time I choose the two part epoxy filler sold by Rust-Olem. With all of the holes and cracks marked (and cuts that I ground into the floor), I filled everything, then ground over the excess to smooth out the floor.
The Epoxy filler used her to patch a hole |
Now is time for a final pressure wash. I also used the shop vacuum to suck up the water, dust, and debris left over from the pressure wash. This worked well…finally I seem to be on a roll and it’s getting closer to completion. The floor is clean, dry, and ready for paint.
This was the easiest part of the process. Considering the number of complaints I’ve read about discoloration patches or epoxy that doesn’t harden, I picked up a drill mixing attachment. I am also planning on using extra paint chips to help add some texture and hide any fluctuations in the color. I used a fertilizer sifter to disperse the chips, which worked well, unfortunately, too well. he chips went down heavy as I was learning to the correct setting on the sifter. Be warned, once the paint chips are down, they are staying, so it might be best to practice in an area that can be cleaned up before on the epoxy (I didn’t practice enough). I did want the chips to be heavy thinking that it would help the slipperiness of the epoxy when wet, however, by the time it was completed, the paint chips where too heavy and just didn’t look good.
The floor after the first pass. Here you can see the heavy use of paint chips. |
On a positive note, I only used a single of the two packages of epoxy I bought, so I can easily put down another coat and cover the chips. Time for another coat, and hope for the best. I can’t imagine having to grind all of this up again because if it doesn’t work. It took a little bit, but I figured out how to cover it up and not have the black chips show through. The trick was to work in smaller size squares than normal and go back over it a couple of times.
The floor after the second pass. Here you can see the texture left by the paint chips. |
In the end, it came out pretty good, and I like the resulting texture. It’s didn’t come out as I expected, but it may actually be better. The color is even and seems like it will be there forever. Next step is to move everything into the space.