Where Do I Put My First Roof Fafter

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.

Where do i put my first roof fafter.

Use this calculator to find your rafter length. More they usually claim that 4 12 is the lowest you can go without any special underlayment. Pull the tape measure along the length of your roof and climb up the ladder in the new position to take your measurement. It is always better to have a large rafter rather than be concerned with a sagging roof.

The ridge end of the rafter and often the eve end will need to be cut to the angle of the roof slope. Many conventional roofing products such as shingles mandate a slope no lower than 2 12. Set the framing square on top of the rafter beam with the tongue facing the top of the rafter. Choose which end of your rafter you want to be the top.

First you ll want to find the pitch of your rafters which will help you find the length of your rafters. Get off of your ladder and reposition it at the other end of your roof. The plumb or ridge cut is made at the top of the rafter. Then use a pencil to trace the outside edge of the framing square s tongue.

Builders aren t bound by standard rafter spacing measurements. But they do tend to space rafters in one of several industry standard increments typically. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.