Expert Tips On Building a Better Deck | Family Handyman
The result is that end-to-end deck boards share the 1-1/2-in. thickness of each joist. That can cause problems, especially with wood decks. With only 3/4-in. of nailing surface, fasteners will cause ends to split. And since the board ends have to be tight, untreated wood will rot. We use a faster, more material-efficient method we call seaming.