Epoxy over paint

[Hellcat]

Just has a full flake epoxy floor with polyurethane top coat installed over a painted floor in my garage. The painted floor lifted in a few spots specificity where tires were. The contractor started sanding floor and said the paint adherence was very good except in hot tire lift areas and the epoxy could be applied over the paint after the surface was roughed up. After he completed, he said not to park on floor for 3-4 days and that I should get rubber mats to protect from hot tire lift.
This isn’t my first epoxy floor and I never had issues from hot tire lift or adding rubber mats to protect a floor I just paid $3,000 for!
Thoughts?

 

[rjacobs]

Me thinks you got screwed.

That floor should have been diamond ground to remove the old paint...

That epoxy will lift IMO.

Sanding? Not even an acid etch?

Sounds like a PISS POOR contractor IMO.

 

[Mark_17]

I think you'll be fine.

But there really is no use in guessing, you'll find out sooner or later.

 

[Shea]

Was this a licensed floor coating contractor or a painter who happens to do garage floors too? This should never have been done.

Unfortunately, any true coating system is only as good as what it is applied to. In your case, it was applied and bonded to paint - not the concrete. As a result, the entire system is completely dependent upon how well the the paint stays adhered. Paint is known for peeling on concrete, especially with hot tires.

As another has stated, the paint should have been removed via grinding first. This also properly preps the concrete for a coating system.

 

[Hellcat]

Was this a licensed floor coating contractor or a painter who happens to do garage floors too? This should never have been done.

Unfortunately, any true coating system is only as good as what it is applied to. In your case, it was applied and bonded to paint - not the concrete. As a result, the entire system is completely dependent upon how well the the paint stays adhered. Paint is known for peeling on concrete, especially with hot tires.

As another has stated, the paint should have been removed via grinding first. This also properly preps the concrete for a coating system.

It was a licensed epoxy flooring company. Only time will tell.

 

[Armorpoxy]

Shea is correct. A proper installation would have required to remove any existing coating/paint. Any product can only adhere to what is under it so no matter how well they applied the epoxy and such, it can only grip to the paint under it, which is not a satisfactory subsurface in our opinion.

We would never install over old paint without a written exclusion from the owner about possible adhesion issues.