Frame Roof Valley

If you begin with accurate as built measurements and use a construction calculator to do the math you can cut all of the rafters for most roofs on the ground in just one shot.

Frame roof valley. Blind valleys simplify framing. Framing a roof valley do the math on a calculator so that you can concentrate on what s important. Framing a roof is the last step in framing new construction. And the line length measurement from the roof peak to the building wall is the hypotenuse.

Usually has a metal valley exposed. The point at which all the rafters are. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The roof rafters provide integral structural support to the roof.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge. Parts of a roof a ridge board is a horizontal member of the roof frame. By rick arnold issue 161.

After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. Getting the rafters right. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.

The run or half the building span is the base of the triangle. Valley roof a valley is a roof design that creates a v shape. The rise or height of the roof at its peak is the altitude of the triangle.