RoyKing
Platinum Member
There lots ideas oh how to put it down some like wood slats think the air space is good idea, other over existing shingles, over shingles with a layer of tar paper, heavy over lapped. Next is where and how to screw down, Some say on the seam only to allow for expansion and others on the flats. So my barn is seams only no leaks, house on the flats no leaks. I like seams only and around the edges