Prep for epoxy - how much grinding?

[tonkadawg]

I'm planning on putting down Legacy SD epoxy in my garage and decided to grind as part of the prep. I rented a 10" diamond grinder and started going at it. The floor is new - poured about 3 months ago and it looks like the builder put a leveling compound down. This is probably a stupid question, but how much grinding is needed? I don't think I should be grinding until the leveling compound has been removed, but I figured I'd ask before getting too far along.

Thanks!

Matt

 

[Armorpoxy]

We always recommend you ask your supplier for tech info...you'll get the correct answer, and Legacy gives great support.

We see sometimes clients posting tech questions, and at times some of the responses, while well meaning, are not correct and can lead to problems if not caught by the supplier.

 

[Kaizen]

What makes you think there is leveling compound? Did it change color? If he really used it due to a big dip and you chase it your floor will be whatever they were trying to fix.
I did mine in two different directions and just enough to get it rough. I didn’t take much off. Maybe an eighth inch.


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[LegacyIndustrial]

We talked earlier. As long as this material is well adhered and porous it should be ok.

That said, leveling compound on a new pour?? May want to chat with contractor.


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[tonkadawg]

Yup - good advice from @Armorpoxy and excellent customer service from @LegacyIndustrial.

I'm guessing it's leveling compound - I'm by no means an expert. I did notice a change in color between the surface prior to grinding (on the right in the pictutures), during grinding (darker color on left) and after grinding (lighter color on the left) down to the desired level as confirmed by Scotty

Here's what I'm talking about:

 

[Kaizen]

Nope that’s the same. Looks great. Now you can see why grinding is recommended


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[Ryanbabz71]

How much dust does this create?


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[tonkadawg]

Nope that’s the same. Looks great. Now you can see why grinding is recommended

The same? You mean that's just part of the slab despite the different colors?

How much dust does this create?

A LOT! I ended up ditching the walk behind grinder in favor of an 7" angle grinder - faster progress more dust. Even after using my leaf blower every 20 or so minutes, I got my a$$ chewed by the wife for the dust cloud that found it's way into the house

 

[Kaizen]

The same? You mean that's just part of the slab despite the different colors?







A LOT! I ended up ditching the walk behind grinder in favor of an 7" angle grinder - faster progress more dust. Even after using my leaf blower every 20 or so minutes, I got my a$$ chewed by the wife for the dust cloud that found it's way into the house

Right. Different color is just dirt and maybe a sealer used.
Man oh man. Worst mistake I made doing mine was not to use a vacuum on the machine. Thought I could just blow it out. Then remembered I had a gas blower and I would die so got electric and it got everywhere. Took several time. Still had it on sill and in stuff hanging on wall.


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