How To Work Out The Size Of A Roof

Make a note of the square footage of each square or rectangular section on your diagram.

How to work out the size of a roof. It is often compared to slope but is not exactly the same. 5m x 4m x 4 2 40 square metres. Outside of the u s a degree angle is typically used. Roof span 2 x roof pitch constant for rafter rafter length.

Be sure to find the area of any dormers on your roof as well. Just multiply the length and width dimensions. Measure the pitch or angle of the roof slope. So if you divide your answer of a product of length times height by two you will get the area of a triangle.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Work out the rafter or hip valley length. The length l times the height h of a triangle is twice its area a2.

Here is an example of how the roofing measurement process works on a basic duo pitched roof. 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. 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.

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. 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. The first step in a free roofing estimate is measuring the roof dimensions. Measure the span building width or run half building width roof measurement guide.