The wood you're using has most likely sat outside for a few weeks behind the renovation center before you went and picked it up. Like others have said, just make sure it's dry when you close up.
That's true, but those bundles of 2x4's are wrapped before shipment from the point of production to protect them on the way to the destination. The plastic wrap is removed just before the bundle is placed in store. The wrap is for weather and scuff protection.
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