Roof Shingle Formula

If this distance measures 4 inches you have a 4 in 12 pitch.

Roof shingle formula.

Rafter rise run from the pythagorean theorem. Although ceramic tile roofs are expensive they can have a life span of over 100 years. The actual cost will vary depending on whether it is a composite asphalt shingle roof or a fiber cement concrete composite shingle installation. The pitch of the roof is the rise over a 12 inch run.

If your roof has dormers hips or other complex elements don t forget step 2 determine the total number of squares. It is often compared to slope but is not exactly the same. Simply enter your roof dimensions and roof type such as gable or hip and approximate roof pitch. Use our roof pitch calculator to find the pitch of your roof.

The best part of a roofing calculator is that it offers a free insight into the total cost of the replacement roof project on a sq ft basis. 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. Formula roofing has worked hard to establish its excellent reputation as one of colorado s most trusted roofing institutions. 100 1 054 105 4ft 2.

Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

As you begin to calculate various costs you will see that the cost is a result of the interplay of many different variables including roof area in terms of footage measurement of any roof extras like chimneys or skylights and the dimensions of. Step 1 find the square footage of the roof. Generally roof pitch is calculated from the same formula that describes a right triangle. You can use the following equations to find the length of the rafter and the slope.

Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. Roof pitch area multipliers. Our calculator will help you estimate the amount of roofing shingles needed for your project plus the cost of materials and accessories. For example a 4 12 pitch roof that is 100 square feet.

8 inches and you have an 8 in 12 pitch. Formula roofing brings over 30 years of colorado specific roofing experience with materials including asphalt shingles clay and concrete tile slate metal roofing and flat roofing membranes and coatings.