How To Work Out The Size Of A Roof

So if you divide your answer of a product of length times height by two you will get the area of a triangle.

How to work out the size of a roof.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Here is an example of how the roofing measurement process works on a basic duo pitched roof. L h 2 area calculating an area of a triangle when estimating a roof. The length l times the height h of a triangle is twice its area a2.

It is often compared to slope but is not exactly the same. You will need to express this size in terms of square feet. How to calculate the roof area of a building 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. Measure the span building width or run half building width roof measurement guide.

The first step in a free roofing estimate is measuring the roof dimensions. Measure the pitch or angle of the roof slope. 5m x 4m x 4 2 40 square metres. Make a note of the square footage of each square or rectangular section on your diagram.

Outside of the u s a degree angle is typically used. If a section is 120 feet 37 m x 100 feet 30 m its total square footage would be 12 000 square feet 1 100 m 2. Roof length x half roof width x roof height 2 roof area calculate the area of a roof to work out how much guttering is required so for a roof that is 5 m long with a height of 4 m and the roof width is 8 m which makes the half roof width 4m we can calculate the effective roof area like this. The roof slope height is 6 98m.

Be sure to find the area of any dormers on your roof as well. 1 roof square 100 square feet. Roof span 2 x roof pitch constant for rafter rafter length. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.