[67ChevyRedneck]

Yep, it can definitely get damp. I left 1/8" gaps around all edges for air to move in and out. The wrap billows in and out under any kind of breeze.

I actually did have to replace a couple of the first sheets I installed from not getting them covered up fast enough. Holy crap do I use a lot of nails. I had to use a sledge hammer and knock the snot out of them to get those sheets off.

I replaced 4 or 5 sheets on my house when I redid the siding for the same reason, not enough nails and it got wet (from original builder).

It's pretty easy to tell when moisture is behind the wrap (you can actually see it). It's all stayed pretty dry unless we got some kind of sideways down pour. I won't put any siding up when it's wet. I actually prefer to finish a side all the way up when the weather is good, just didn't work out this week. Now that I've started and have all my lines marked and corners/doors framed, I should be able to finish this side quickly.

It will also be a couple of months before I get any insulation done, so that should aide in drying everything out before it's fully closed.