How To Figure How Much Roofing You Need

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.

How to figure how much roofing you need.

We plan to enable the use of fractions at a later time. And this guideline you ll need a minimum of. Measuring the amount of metal roofing you need is accomplished in various ways depending upon the style of your roof. The first step in a free roofing estimate is measuring the roof dimensions.

For roof pitches of 5 12 to 7 12 use a factor of 1 3. 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. 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. If your roof pitch is 3 12 or 4 12 multiply by 1 25.

You will need to express this size in terms of square feet. How to figure metal roofing to use this panel length calculator enter whole numbers and decimals only. Enter the diameter of the roof ridge vent gap 1 3 finally enter the coverage area width of the panels you plan to buy. You can determine how much metal you will need for your roof.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. So dividing the area of the roof by 32 will give you the number of sheets needed. For example if your roof has valleys and dormers that will change the way you measure it. 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.

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. To accurately calculate the area of your roof you must first determine its slope or pitch. Use 1 4 for up to a 9 12 pitch. 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. 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. Near ridge of the roof. A 4 8 sheet of plywood is 32 ft 2.