If they did not install the foam isolation barrier, I can easily see you having a crackling sound. The concrete floor probably had some dust and debris, which is now trapped between 2 hard surfaces, and when you walk on it, it is either moving or crumbling, either will cause noise. Do you remember if the isolation barrier was installed? If this was installed, then quiz the flooring manufacturer to see if the correct barrier was installed. I installed these types of floors myself several times back up north, and as I recall the warranty was void if I did not use the correct barrier.
Hope this helps.
__________________
Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
|