How To Build A Cut Roof

The roof rafters provide integral structural support to the roof.

How to build a cut roof.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. The seat rests on top of the wall that you re attaching the particular rafter to while the shoulder cut parallels the wall and allows several inches of each rafter to overhang the roof. The rise or height of the roof at its peak is the altitude of the triangle. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Robin is working on an extension so we thought we d shadow him for the day and see how he creates a pitched roof or semi pitched roof leading up to a flat. The diagram above shows the components that go into making up a small gable roof. There are two basic methods of pitched roof construction. And the line length measurement from the roof peak to the building wall is the hypotenuse.

The run or half the building span is the base of the triangle. 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 ceiling joists span from wall plate to wall plate and are sometimes bolted to the rafters to help stop the ridge. Pitched roof construction.

A horizontal cut called the seat cut and a vertical cut called a shoulder cut. The ridge is a long board at the top that the rafters are nailed to.