Detail Skillion Roof Framing Plan

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Detail skillion roof framing plan.

Skillion roof rafter detail diagram with all dimensions and birds mouths scale. The skillion and shed style roofs are framed with a single slope 2 4 or 2 6 or thicker rafters spanning from the low wall to the high wall. Skillion roof framing calculator plan diagram with full dimensions. And the line length measurement from the roof peak to the building wall is the hypotenuse.

This design is a particularly effective way to trap water which is a big advantage for houses where collecting rainwater is a priority. The run or half the building span is the base of the triangle. Skillion roofs are generally built upon rafters but cost considerably less than roofs that feature multiple slopes. Variations on the skillion roof include circular or oval shaped designs and the butterfly roof.

A butterfly roof has two skillions which angle down towards the centre. A fair estimate for a skillion roof is anywhere from 6000 to 12 000 depending on various factors like the pitch and the materials used to build the roof. If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters. Skillion lean to roof profile diagram quest.

Mark out angle birds mouth. Skillion lean to roof framing calculator. Skillion shed style roof framing. Mark out angle birds mouth.