Help Fix Bad Engineered Floor Installation

Due to water damage I had about 2000 square feet of engineered floor replaced. The original floor was affixed solidly to the concrete subfloor with a "one-step" glue down product. I was away when the sub-contracted installer started and could not prevent the use of a foam membrane which was glued to the concrete before the hardwood was glued on top of the membrane. The individual planks were not glued to each other. It proved very difficult for the experienced installer to adhere to the concrete. He was unhappy with the product his boss had selected. There were many visible bubbles which were patched. After the installation, I removed and replaced a defective plank and observed that the foam had adhered perfectly to the wood but had absolutely no adherence to the concrete. The bottom of the foam looks as clean as when it was fresh. Walking on the floor results in many snaps and crackles. Not at all what the original solid glue down floor was like. Contractor says give it time. Time has passed and floor still pops and crackles. Contractor says he can drill small holes and inject epoxy to fix this. I don't want a series of small holes but neither do I want the turmoil of ripping this out and staring over. Contractor has not been paid anything. How much, if any, popping and crackling is acceptable? Any one try the drill/injection fix? Any other solutions come to mind? Thanks for comments.
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John Keiser wrote:

Hate to say it but injecting epoxy or any other glue ain't going to work . Make him tear it up (yeah , I know it's not your first choice) and replace it with the same thing you had originally . Properly installed direct glue will not snap and pop . I think if you let him try to repair this you're just going to be chasing your tail and will never be satisfied . (16 yrs as a flooring installer)
--
Snag



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On Monday, May 9, 2016 at 1:14:03 PM UTC-4, John Keiser wrote:

First thing is what do the install instructions from the manufacturer say about how it's supposed to be installed? Was it installed to thos directions? Have you contacted the manufacturer?
I'd be very skeptical that a drill/injection is the solution, something is clearly wrong. After the above, next step might be to get in a pro for an opinion as to what is wrong, someone that installs the specific product that was used.
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