Estimate Square Feet Of Roof

How to estimate roofing materials.

Estimate square feet of roof.

Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments. The first step in a free roofing estimate is measuring the roof dimensions. Shingles and other roofing materials such as underlayment are typically measured in squares that are 10 feet long and 10 feet wide with each square measuring 100 square feet. You will need to express this size in terms of square feet.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. For estimating purposes we also assume that there is a chimney a couple of dormers and two layers of old shingles that need to be torn off and removed before a new roof. To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the roof.

For instance if the roof is 1550 square feet then it is 16 squares. Assuming this is a hip roof we multiply this by 1 1 which gives us roughly 18 squares or 1 800 square feet of the roof surface. Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square. This gives us a 3d roof area of 1 625 sq ft.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. Don t just look at roofing material although a big chunk of the cost is the type of material you also need to consider how many stories the complexity of the roof slope or pitch how many chimneys skylights dormers ridges roofing company geographic location taxes. Estimate the pitch of the roof. The answer is the number of roofing squares for the roof.

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. Before you do any roofing work you must calculate the roof s square footage to determine how much material you need. How to calculate roofing costs. When installing new roofing there are many factors to consider when estimating price.

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. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width.