How To Determine Number Of Squares On A Roof

Roofing contractors estimate projects and materials by the square so it is crucial to find this measurement to accurately estimate the amount of material needed.

How to determine number of squares on a roof.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. The problem is that your roof might be too steep for you to walk on it without the correct equipment. Don t round your roof measurements up or down. Singles are often sold in bundles with three bundles equaling one roof square.

To find the amount of plywood needed to cover a roof start by finding the area of the roof. Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing. To calculate the number of squares or bundles you need you should consider using the measurement method. Multiply the number of roofing squares for a low pitch roof by 1 06 to 1 08 to get the square roof area.

Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed. Write out each measurement exactly as it appeared on your tape measure to the nearest 1 2 inch 1 3 cm. 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. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.

To properly calculate how many bundles of shingles are needed to roof your home you need to calculate the total square footage of the roof and convert it to squares. Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet. You ll be using these numbers to calculate the total square footage of the roof later on. A square simply refers to a 10 x 10 square of roofing.

However shingles are packaged in a way that they are light enough for the average person to carry around. Depending whether the roof area is measured horizontally possibly from a drawing or photograph a correction factor is necessary to determine the actual area of the roof. This method is considered the most accurate but you will need to get onto your roof to complete it. To find the squares divide the overall roof area by 100 and then round up.

Find the area of a roof. The materials used for the shingles or seam panels the surface area of the roof with a measurement typically in squares and any special features related to the complexity of the roof itself. A square represents 100 square feet of area covered by shingles. As a result you might need to calculate an estimate of how much it will cost to replace your old roof with a new one.

This will be done once it s time to determine the number of shingles you need. Multiply the number of roofing squares for a medium pitch roof by 1 12 to 1 25 or by 1 3.