because, how do you expect a flooring like Pergo to adhere to a bumpy type floor, even if it may be floating?
Floor levelor is actually for isolated holes and pockets in order to smooth them out.
In your case, for a proper fit, you need to level your flooring area as much as possible. If not, the pergo will bounce, squeak, rock, move, and have a strange feel when you walk on it.
Now, you can have your entire floor leveled by pros that do this big of job. It would be similar to laying a sidewalk in that it would be screeded, leveled, and smoothed out.
You could possibly get away with a double or triple layer of the membrane that is sandwiched between the pergo and the actual floor.
You need to check some things out first.
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