Figuring The Height Of A Gambrel Roof

The lower slope length is measured from outside wall to the start of the upper sloped roof section.

Figuring the height of a gambrel roof.

The calculator made my life easier. Gambrel roof framing geometry calculator metric this gambrel roof confines to a semicircle and starts as the top half of an equal sided octagon. Height a good rule to follow with a gambrel roof design is that it should be twice as wide as it is high. Gambrel roof square footage calculator calculate the square footage of a gambrel style roof using imperial measurements.

A 1 in 12 roof pitch roof rises 1 inch for every 12 inches of run. As a reminder please don t forget to add height of rafter thickness of roofing material and ridge vent to the number that you ll get using our calculator. In other words if you start with a say 14 12 bottom pitch your top pitch should be 7 12 or greater. The lower slope is locked for regular gambrels.

Rafters are nailed to the ridge board and run down to overhang the exterior wall. This will give not only asymmetrical appearance but also balance out the load of the building over a much more stable area. If at all possible it looks the best at exactly half. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth.

Building width enter the width of the building. Everything was simple just calculate get all the drawings then frame a roof. All results of calculations is accurate. Carpenters measure roof pitch as inches of rise per 12 inches of run.

The rule of thumb that i use when designing a gambrel is that the top pitch should be no less than half the pitch of the bottom. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The lower height is calculated automatically for regular gambrels.

Calculate hip roof online. Building a bathhouse with a hip roof. If this isn t practical then perform the same measurement on the underside of the roof. Enter the slope of the lower gambrel rafter or select from the dropdown list.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. If your goal is to only calculate the roof height do not enter any numbers in wall height field and only use building width and roof pitch fields. The pitch of a roof determines the height of the ridge board that runs the length of the house. Bath with a gambrel roof.

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.