Gambrel Roof Detail

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.

Gambrel roof detail.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. You should utilize three tab asphalt shingles for this project. Once you have the plans you can cut and construct the rafters before installing them on your structure. This gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. The application of shingles over a gambrel roof has very little variation from the application of shingles to a traditional roof. 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.

If you plan on building and installing your own gambrel roof you ll have to draw out plans first to determine the proper dimensions. Similar to mansard the lower side of the gambrel roof has an almost vertical steep slope while the upper slope is much lower. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. The difference between the two is that the gambrel only has two sides while the mansard has four.

Dealing with two roof pitches instead of one seems to complicate matters disproportionately. 34 43 ridges 34 eaves 35 gable endwall 36 sidewall gambrel 37 transition pipe boot 38 skylight chimney 39 41 dormer details 42 43 accessories 44. The project architect briefly discusses the basics of gambrel roof design. Also most gambrel roofs require a kneewall to support the knuckle or the joint between the upper and lower roof slopes.

Window details 30 residential building details 31 residential load tables profiles 32 residential flashings trim 33 residential trim details. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. 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. Gambrel shed roof pitch and corresponding degrees for our example the gambrel roof has two pitches the top and the side.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof.