I have Pergo in my basement, and I had a little water get in near the door, through some cracked caulk. It bowed up, from the water damage, so I what I did was drilled 5 notches under the trim at the door. Then I drilled the cement floor and installed anchors. I then put washers on the screws, and used them to put the floor down (not too tight). The notches with washers allow the floor to float, and still hold the bowed section down. The trim covers up the screw and I have a mat at the door anyways, to cover the slight imperfection.
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