You should decide by walking through the home whether the floor structure is a problem for you.
Floor not flat.
You must check and control the flatness.
Slide the tongue of laminate being inserted into the laminate already on the floor.
Although floors in the home were out of level and not flat this is always the case.
Near the door there is an empty space under the flooring so that the flooring bounces.
As you are moving the piece into the grooves on the flat piece lower the piece in your hand as you are pushing it together with the flat piece.
In the tile world the word flat means that the surface does not have any significant high or low spots and will yield a smooth tile installation with no lippage between tile edges.
Before it was barely noticeable but now it bounces between 1 4 and 1 2.
Why is my laminate flooring not laying flat.
The bulges probably mean that the floor is not flat which means starting over again i m afraid.
No homes have perfectly flat level floors but many have floors in which the changes are so minor that they are not noticeable.
Snap together the sides of the laminate pieces together by holding the piece you need to install upwards.
There is a laminate floor that looks like wood floors.
I would consult with nwfa the national wood flooring association for any additional symptomatic problems that may exist.
Not being flat can cause problems with plank adherence to the floor hollow spots t g not fitting correctly etc.
Here s how flat floor and level floor are different.
Also check for any damp areas this would swell the laminate if wood.
And don t forget to lay an underlay felt or a rubber composite type floor covering.