Gambrell Roof Construction

A gambrel roof is a popular roof style on many contemporary barns and sheds.

Gambrell roof construction.

The oldest known gambrel roof in america was on the second harvard hall at harvard university built in 1677. 1677 78 peter tufts house. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.

Lower height the lower height is the distance from the floor to the peak. Gambrel roofs are symmetrical with two slopes on each side of the roof. Use this information at your own risk. Building width enter the width of the building.

With a gambrel roof is the c. Possibly the oldest surviving house in the u s. Gambrel roof a gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. As always seek the advice of your local building officials if you plan on using this information to build your shed roof to make sure your shed will be built to local building code specifications.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. A couple years ago when i was building my 15 by 20 foot log cabin in far northern washington i decided to top the building with a gambrel rather than a more conventional gable or a frame roof.