How To Figure Roof Size For Shingles

Calculate your roof pitch to determine how steeply your roof slopes.

How to figure roof size for shingles. Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. The shingle count method of the old shingles have not been removed from the roof you can easily use this method to calculate the number of shingles you are going to need. The dead air space between the metal roof and shingle roof will work as a barrier to dissipate heat. Once you have these measurements you will need to calculate the area of the roof and then you can see how many shingles you will need.

I typically begin by counting the of shingles from left to right which gives me the total width of the section in feet. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. It should have a curved roof.

Once you work through the basic triangle we will review a typical roof and how to apply some simple math to calculate how much material you will need for a roof used in our hypothetical example. 1 roof square 100 square feet. The length l times the height h of a triangle is twice its area a2. The first step in a free roofing estimate is measuring the roof dimensions.

Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle. A mobile home roof should not be flat. And then i will count the of rows of shingles between the gutter and the peak of the roof and then divide the number by 2 which gives me the height measurement. If you are going to use shingles build a pitched roof over the mobile home.

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. 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. Outside of the u s a degree angle is typically used. You will need to express this size in terms of square feet.

For example you may need to pay double the cost in asphalt shingles if your roof has a 12 12 pitch a rise of 12 inches 30 cm per 1 foot 0 30 m as opposed to a 4 12 pitch.