How To Work Out The Size Of A Roof

5m x 4m x 4 2 40 square metres.

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. The length l times the height h of a triangle is twice its area a2. Work out the rafter or hip valley length. Outside of the u s a degree angle is typically used.

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. Measure the span building width or run half building width roof measurement guide. L h 2 area calculating an area of a triangle when estimating a roof.

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. Just multiply the length and width dimensions. Here is an example of how the roofing measurement process works on a basic duo pitched roof.

It is often compared to slope but is not exactly the same. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Make a note of the square footage of each square or rectangular section on your diagram. Roof span 2 x roof pitch constant for rafter rafter length.

The first step in a free roofing estimate is measuring the roof dimensions. Measure the pitch or angle of the roof slope. 1 roof square 100 square feet. 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.