How To Figure Out How Much Roofing You Need

Near ridge of the roof.

How to figure out how much roofing you need.

To accurately calculate the area of your roof you must first determine its slope or pitch. 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. Add a square for waste so you will need 157 bundles. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.

And this guideline you ll need a minimum of. Calculate sheathing needed once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. The first step in a free roofing estimate is measuring the roof dimensions. If your roof pitch is 3 12 or 4 12 multiply by 1 25.

Measure the length of your roof. Determine the width of the metal you are installing. For example standing seam metal roofing is. For roof pitches of 5 12 to 7 12 use a factor of 1 3.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Multiply the total area determined in step one by a correction factor to account for the roof pitch. This correction factor will take into account the greater area of the roof due to the pitch. Take the square foot of 5 128 divide by 100 100 sq ft is equal to one square so you have 51 28.

How to figure how much metal roofing you need. You will need to express this size in terms of square feet. So dividing the area of the roof by 32 will give you the number of sheets needed. Use 1 4 for up to a 9 12 pitch.

While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. Based on your 1100 sq. 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.

This is done by measuring from one outside edge of your roof to the opposite outside edge. 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.