How To Figure A Barn Roof

To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.

How to figure a barn roof. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Use our roof pitch calculator to find the pitch of your roof. A gambrel has four angles at the peak at the wall and where the two rafters or truss chords connect. However in order to figure out exact height of the building you will need to add the following additional compoments to a given result.

A gambrel style is often called a barn roof. Roof pitch area multipliers. Depending on the size of the roof and the pitch of the roof these angles will change. A gable roof has only two rafter or truss chord angles a top cut at the peak and a bottom cut at the walls.

Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. Its double or sometimes triple slopes on each side of a peak provide more space inside the roof which is attractive to homeowners too. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Gambrel roof a gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. To calculate a gambrel roof. The pitch of the roof is the rise over a 12 inch run. The metal roof length calculator calculates the distance from peak to trim so add the length you want the roof metal to extend beyond the eave trim.

For instance a 38 panel will have an effective coverage width of 36. Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. To accurately calculate the area of your roof you must first determine its slope or pitch. For example a 4 12 pitch roof that is 100 square feet.

Foundation if any above grade height of rafter or top chord of truss height of roofing materials including plywood shingles and ridge vent. Enter the diameter of the roof ridge vent gap 1 3 finally enter the coverage area width of the panels you plan to buy. You want to try and use angles that are as close to 45 as you can get for both ease of construction and good strength. Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area.

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