Dip In Floorboards

You want the area wet but not soaking as this could cause other boards to bow.
Dip in floorboards. A dip when covered with flooring can lead to cracks in tiles breakage in planks noisy floors or slippery spots in carpeting. Avoiding these problems requires that you level the dips before the new surface installation. There was a small humidifier ours running non stop in the basement but the weather took a very hot and humid turn with almost daily rains and temps. To test for the flatness for laying laminate flooring on an uneven subfloor lay a 10 foot long 2x4 board.
These hills and valleys will eventually lead to unwanted bouncy spots squeaks and groans in the final laminate floor. Push the sawdust down into the pva so it is level with the top of the board. Between the installation and our moving in the new build did not have an air conditioner yet. This compound can potentially be utilized on a concrete slab or a wood subfloor and it works well when you are dealing with dips in the floor.
One leveling solution is with the application of a self leveling compound. Leave until pva is dry and then go over the joint with a small electric sander. The joint will sand down and look very similar to the board surface but because of the pva content will not stain in the same way. Look at the board where it touches the subfloor and see if there are any dips bumps or otherwise uneven areas.
Wet down the floor boards slightly. A little cheat to help work past a small dip in your subfloor when installing laminate flooring. When you are dealing with uneven floors one option that you have is to use self leveling compound. The den floor boards that had buckled are flatter but don t feel right when you step on them.