Plan Roof Area Formula

The base width is the distance from one corner of your roof to the other at its base on the short side of your house.

Plan roof area formula.

Area is defined as the expanse or measurement of a given surface and there are a few methods for measuring your roof s area. Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118. The roof slope height is 6 98m. The roof area is simply 114x18x2 plus 30x18x2 giving 5184 square feet which is perfectly adequate for estimating materials.

That gives you 5 590 square feet which is the actual area of the surface of the roof. Dividing by 12 gives the ratio of inches in rise per distance. Once you have your roof s pitch divide the number by 12. Calculating the area true if you want to get the exact area measurement for your roof you can follow these steps.

Adjust to suit for a good straight fascia add an extra 20 mm or so to the tails of all your rafters total length. Hip roof framing calculator plan diagram with full dimensions. Our roof calculator uses base length and base width to find the estimated area. Calculating area is easy in two dimensions but nearly all roofs slope up to a peak which adds a third dimension.

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. If you re planning to put a new roof on your house it s important to purchase enough matching shingles to complete the job. How to calculate the roof area of a building. Divide your roof pitch by 12.

Roof pitch is given as the number of inches in height change over the distance of one foot. Shingle roofs typically have a life span of 15 30 years. A rafter for a roof with a 6 12 slope will be 1 118 times as long as the. Print full scale paper templates cut and fold over wood to mark and cut angles.

The most common roofing materials used in the united states include shingles membrane roofing and ceramic tile all of which have different life spans. If your number is 1 3 squared would yield 1 9. Rafter join detail hip roof framing hip to common to ridge join diagram. And that s the number you were looking for.

This applies to lengths as well as areas. To do that you need to accurately calculate the area of your roof. For example if your roof s pitch is 4 in 12 you would divide 4 by 12.