Another point.... my laminate ended up remaining in the shipping roll for far longer than I wanted.... about 20 days
.... family issues - don't ask
.... then, unrolled on the parlor floor, it was a big curl with lot's of waves
.... piled some stacks of vinyl discs on it to flatten it out, but I was dismayed at the waves between stacks.... imagine all those little screws around the edge
Now, a few days later, I've removed the vinyl stacks and voila!!!
It's perfectly flat on the floor! So, temperature and package-stresses should patiently be removed before mounting !!