How To Figure Roof Size

Roof pitches are described in terms of rise and run.

How to figure roof size.

To accurately calculate the area of your roof you must first determine its slope or pitch. To measure a roof start by measuring the length and width of the building s exterior walls and multiplying them to get the area. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. The run is the distance from the outside edge of a.

Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. Tips on measuring for roofing. Then calculate the pitch of the roof by placing a level against it angling the level so the bubble is centered and measuring the distance between the end of the level and the roof. 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.

To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares. Sq ft number of squares you need. Nominal roof size in sq. Outside of the u s a degree angle is typically used.

Actual square feet of house. To accurately calculate the area of your roof you must first determine its slope or pitch. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. You will need to express this size in terms of square feet.