What caused these Lap Marks in new Polyaspartic?

[liazon]

Hello,
Thanks in advance for your insights.

I had a professional garage flooring company refinish my garage floor. It was a process that included: machine prep, epoxy, full vinyl flake, and a polyaspartic top coat

As you can see in the photos, there are 'lap marks' separating darker and lighter areas. These aren't shadows.

I'm hoping those with experience can help me understand what caused the issue?
I'm to meet with the installer about the issue and it would be nice to be able to speak intelligently about it. Also, I read in another thread about 'roller marks' in polyaspartic that the fix might be a light sanding and recoating w/ a 2nd coat of poly. Have you had personal success with that approach? Believe it would result in a uniform appearance?

Again, TY for taking the time to offer your professional opinion.

 

[benwah]

What caused that is inconsistent mil thickness. One section has less coating on it than the other.

You should inspect the lighter coverage area and ensure you actually have complete coverage over the flake. If you do, You could live with it and the difference will walk out overtime most likely. The other option is to have the contractor come back, scuff the entire floor and apply another coat.

 

[liazon]

thank you.

 

[liazon]

The contractor came back to fix the mistake. He states he scuffed up the whole floor (below the step), followed by fast drying 'something', followed by more flake, scrape, and another layer of polyaspartic. But, once again the floor is not uniform in appearance (that's not a shadow). The previous area with discoloration was 'fixed' but now there's a new line (new location) running the length of the garage with different shades on either side. This area was previously just fine. Is this once again different mil thickness? How to fix? I simply want the whole floor to be uniform (not perfect but professional) which seems a fair request from a professional charging $3100.

Given the same mistake was made twice and the nature of the line being so straight, I have to wonder if this might be the results of only a 2 man team trying to do a 3 car garage.

Thanks for your help.

 

[SteveL]

Following as I’m going to be getting the same system done in a couple of months.

 

[LegacyIndustrial]

Could be where he started a new batch, went in a different direction, had a smoke break, had a phone break, didn’t continue the same pattern as before, didn’t back roll , Few different possibilities. Only way to fix that is to do the whole floor over with a fresh coat.. still might slightly see it but overtime it will dissipate.

 

[liazon]

what I learned (and my advice) is this:
1. insist on an installer that uses 3-4 people on the application day. (the product is not forgiving)
2. there's a lot of newer companies doing these as they are franchising the businesses. make sure they are very experienced.
3. agree very clearly on expectations regarding clean up...they use leaf blowers to blow off the extra dust after the grind and on the extra vinyl chips (after a vacuum) and u end up w/ dust everywhere (neighbor's cars) and vinyl chips (not bio degradable) in your yard.
4. never submit final payment until after it dries.

that said, it's a beautiful floor if you can get the right contractor.