I installed a new engineered hardwood floor about 2 years ago. It's a floating installation on top of 1/4 inch cork underlayment. The installation went smoothly, but when I was nailing the baseboards back down, I put a nail through a pipe and didn't realize it until about an hour later. Needless to say, the floor was soaked in that one place. Vacuumed up all the water and put fans in the room for a couple of days, and everything has been fine in the room except for one spot.
I'm not sure if the water caused some warping or if it's something else but there is one spot on the floor about 1.5 sq ft that is raised. It's not visibly noticeable, but you can tell when you step on in. There's about 1/2 inch play in the floor. The weird thing is, I can stand on it for about 10 seconds and it seems okay for the next hour or so before slowly coming back up. It's right in front of the entrance to the bathroom, so it's something we encounter daily.
So my question is, is this something that can be corrected with some Dri-Tac injected under the floor? I'm not sure how well that works with a floating installation on top of cork underlayment. If that's not a viable option, can anyone suggest another way to fix the floor in that one spot without tearing up the whole floor?