Standard skylights are made to install directly above rafter spacing of either 16″ or 24″ from center to center. Standard skylights therefore fit at 16″, 24″, 32″, 48″ or 72″ widths. And lengths of 2′, 2 1/2′, 3′, 3 1/2′, 4′, 5′, 6′. We can build the curb, cut the opening, install the skylight and do all exterior flashing and roofing work for one contract price. And we can also frame and clad the interior with wood or drywall.