PLEASE NOTE IN ORDER TO MAINTAIN BOTH YOUR INSTALLATION GUARANTEE, ALONG WITH YOUR FLOORING MANUFACTURER WARRANTY, YOU MUST BE SURE TO ADHERE TO THE GUIDELINES SPECIFIED IN THE INSTRUCTION MANUAL OF YOUR SPECIFIC FLOORING.
The most common problem with all kinds of hard surface flooring, are areas where the flooring sinks, squeaks, or bounces when walking over them, due to floor leveling negligence. In most cases, this will never deteriorate the integrity of your flooring; however this is not always true. Engineered flooring and laminate floors with compromised sub floors, have a tendency to separate from itself at the joints. Furthermore, this tends to be the cause of the gaping sometimes seen with laminate flooring at the joints.
A properly leveled sub floor will yield flooring that feels nice and solid, and lasts longer! Floor leveling is by far the most powerful reason laminate flooring has obtained a negative reputation as poor quality flooring, however real wood and engineered flooring are also prone to the same poor leveling circumstances if the floor leveling is not inspected and corrected if required.
Dealing with a wooden sub floor is much easier to work with than a concrete sub floor; however in both cases, the solution is adding leveling compound to low spots or if possible, grinding down high spots. When dealing with Nail down installations, cement compounds cannot be used because the fasteners holding down the flooring will cause the compound to crack. When dealing leveling issues regarding nail down installation, a combination of plywood, construction paper, and an electric planer are crucial for proper results.