We had a flood in February, due to a broken water pipe in the kitchen that seeped water into the living room area, and ruined our hardwood floor. After long discussions with the insurance company the job was given to replace the complete floor. It was replaced with Mannington Jamestown engineered hardwood. This was completed about 3 weeks ago.
Since this has been done we have noticed there seem to be "squeaks" in some areas of the floor. As well there seem to be hollow sounding spots.
Should we be concerned?
The floor is a concrete base. They did a cork underlay which was glued to the concrete and then it was glued onto the hardwood.In February, moisture tests were run, holes were drilled in the walls and baseboard and fans were blowing hot air into the wall for 3 days. The original hardwood floor was not removed until early June and then the new cork and floor were installed over the next three days. I forgot to mention previously, that this is a condominium and the builders did not make a smooth even concrete surface when the original cement floor was placed.The wood was climatized in the warehouse for 3-4 days before it was brought to our home to be installed.
Are there options available other than starting over which for personal health reasons, is not really an option, which i would imagine they would not do anyway.

Movement causes squeaks.
an unflat substrate causes hollow spots.


From my monitor, it sounds like the proper floor prep was not done.

They can drill and fill, to remedy the areas of concern.

Even the best of us, will get a hollow spot in a gluedown. I can walk into any gluedown over concrete, and if I tap long enough all over the floor, I will find a hollow spot.As long as it is no bigger than 1 sq.ft in diameter, or it does not make noise, it will be fine

thanks for the information