Where Do I Put My First Roof Fafter

Rafter and roof joist spacing is only one part of a complex roof design that works together to form a structure that meets building codes and can hold up the weight of the roof and roof load.

Where do i put my first roof fafter. First you ll want to find the pitch of your rafters which will help you find the length of your rafters. But they do tend to space rafters in one of several industry standard increments typically. Then use a pencil to trace the outside edge of the framing square s tongue. Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.

Pull the tape measure along the length of your roof and climb up the ladder in the new position to take your measurement. Use this calculator to find your rafter length. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. The ridge end of the rafter and often the eve end will need to be cut to the angle of the roof slope.

Choose which end of your rafter you want to be the top. It is always better to have a large rafter rather than be concerned with a sagging roof. Many conventional roofing products such as shingles mandate a slope no lower than 2 12. The first step in building the roof rafters is to cut one rafter board to length with the ends angled properly and then to mark and cut the birds mouth and seat on the rafter.

Climb a ladder near the corner of your roof and tape the end of your tape measure against the rafter using duct tape. More they usually claim that 4 12 is the lowest you can go without any special underlayment. Set the framing square on top of the rafter beam with the tongue facing the top of the rafter.