We just picked up about 500 sq ft of Unibord laminate flooring to finish off the basement and had our friendly neighborhood jack of all trades contractor try to get us to install it that day because it suited his schedule. He said, "I've put 'em down fresh out of the box, no problem. Warm store, warm van to carry it home, warm room in your house. Same thing, pretty much."
Yeah. And "pretty much" will screw you every time, too.
I've watched the little 10-minute VHS tape that comes in the Uniboard kits some time ago when it was sitting in my friend's video bin after he installed his flooring, and Uniboard recommends that the plastic on each bundle of board be opened and the bundles left to become acclimated to your room(s) for at least 48 hours. So we told our contractor dude that we'll be following the manufacturer recommendations, thankyouverymuch. He wasn't happy because he had to go scratching for something else to do somewhere else for 2 days, but f*ck him, it's our house.
Likewise, I've seen a few of those DIY TV shows where the DIY'ers didn't leave the bundles to set and -- surprise! -- they couldn't get the planks to fit together properly.
Lesson #1 when it comes to any DIY project: Manufacturers include instruction sheets for a reason. Read 'em and follow 'em. 'Nuff said.
AJS