Gambrel Roof Detail

Gambrel shed roof pitch and corresponding degrees for our example the gambrel roof has two pitches the top and the side.

Gambrel roof detail.

Gambrel roofs can be a challenge. A gambrel or a barn roof is much like mansard in a sense that it has two different slopes. A gambrel roof is often thought of as a bard style roof where the roof of a structure has multiple slope changes on either side of the roof. The difference between the two is that the gambrel only has two sides while the mansard has four.

You should utilize three tab asphalt shingles for this project. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Gambrel roofs are symmetrical with two slopes on each side of the roof. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

Also most gambrel roofs require a kneewall to support the knuckle or the joint between the upper and lower roof slopes. Dealing with two roof pitches instead of one seems to complicate matters disproportionately. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Two different roof pitches with a gambrel shed truss the picture above shows a top roof pitch of 4 12 and a side pitch or 23 12.

This gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon. This gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Window details 30 residential building details 31 residential load tables profiles 32 residential flashings trim 33 residential trim details. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof.

Once you have the plans you can cut and construct the rafters before installing them on your structure. Similar to mansard the lower side of the gambrel roof has an almost vertical steep slope while the upper slope is much lower. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. If you plan on building and installing your own gambrel roof you ll have to draw out plans first to determine the proper dimensions.

The application of shingles over a gambrel roof has very little variation from the application of shingles to a traditional roof. To calculate a gambrel roof.