All of our buildings come standard with Horizontal roofs, but we also offer vertical roofs on A-Frame buildings. A vertical roof is more structuraly sound for two reasons. First, the ridges of the panels run down the slope of the roof, allowing rain and snow to freely run off. Second, extra braces are added to the roof. This allows the 3' wide panels to be placed parrallel with the 4' - 5' spaced bows of the roof. A vertical roof is felt to have a more appealing look to some.