Plan Roof Area Formula

Dividing by 12 gives the ratio of inches in rise per distance.

Plan roof area formula.

How to calculate the roof area of a building. Print full scale paper templates cut and fold over wood to mark and cut angles. Adjust to suit for a good straight fascia add an extra 20 mm or so to the tails of all your rafters total length. Calculating area is easy in two dimensions but nearly all roofs slope up to a peak which adds a third dimension.

Area is defined as the expanse or measurement of a given surface and there are a few methods for measuring your roof s area. If you re planning to put a new roof on your house it s important to purchase enough matching shingles to complete the job. That gives you 5 590 square feet which is the actual area of the surface of the roof. Rafter join detail hip roof framing hip to common to ridge join diagram.

A rafter for a roof with a 6 12 slope will be 1 118 times as long as the. To do that you need to accurately calculate the area of your roof. The roof slope height is 6 98m. Once you have your roof s pitch divide the number by 12.

Divide your roof pitch by 12. Roof width m x roof slope height m half roof area m take this example of a perfectly square house with 76m floor space a 45 pitched roof and a 2 35m roof height. Shingle roofs typically have a life span of 15 30 years. Calculating the area true if you want to get the exact area measurement for your roof you can follow these steps.

And that s the number you were looking for. Our roof calculator uses base length and base width to find the estimated area. The roof area for a hip end is the same as for a gable end the intersection is equivalent to a hip slightly conservative so there is usually no need to consider triangles when measuring a roof. For example if your roof s pitch is 4 in 12 you would divide 4 by 12.

Roof pitch is given as the number of inches in height change over the distance of one foot. This applies to lengths as well as areas. This would yield 1 3 next square your result. If your number is 1 3 squared would yield 1 9.

Hip roof framing calculator plan diagram with full dimensions. The most common roofing materials used in the united states include shingles membrane roofing and ceramic tile all of which have different life spans. Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the roofing material calculator.