I was at a friend's new home the other day looking around, and the insulation various parts of the house was stapled differently. If I remember correctly, it was face stapled in the basement, ie: the flaps were folded over the studs and then stapled. It was also face stapled in a couple rooms on the third floor, but the rest of the house was inset stapled, ie: the flaps were set back on the inside of the studs and stapled to the sides, leaving about an inch between the drywall and the facing of the insulation.
I looked around tonight at a few sites, and have found it suggested both ways. Fine Homebuilding's site says to inset it, but others say the face stapling is the ideal vapor barrier.
So is there a right way and a wrong way, or is it just the installers preference? And drawbacks for one over the other?
Thanks all.