Greetings,
I'll be installing a laminate floor over a concrete slab. The installation instructions specify that the subfloor must be level to within 2mm (they don't specify over what gap though).
I just spent some time trying to determine how flat my concrete slab is by placing a piece of string really taut and then measuring the gap between the string and the floor.
On the worst spots, the gap was a little over 2mm, perhaps 2.5mm.
Do I need to worry about this? How much is "too much"? I'm wondering if I'd make things worse by trying to fix these depressions (just a couple of spots in a 15' x 20' room).
Thanks.
-jav