Frame Roof Valley

Valley roof a valley is a roof design that creates a v shape.

Frame roof valley.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The rise or height of the roof at its peak is the altitude of the triangle. 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. 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.

Blind valleys simplify framing. Getting the rafters right. Usually has a metal valley exposed. The run or half the building span is the base of the triangle.

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. And the line length measurement from the roof peak to the building wall is the hypotenuse. Parts of a roof a ridge board is a horizontal member of the roof frame.

Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. Often seen on complex roof shapes. 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. 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.

The point at which all the rafters are. The roof rafters provide integral structural support to the roof. Framing a roof valley do the math on a calculator so that you can concentrate on what s important.