Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry.
Figuring shingles for roof.
Calculate the size of your roof and estimate how many bundles of asphalt shingles rolls of felt and squares of roofing material are needed for a new roof.
Calculate your roof pitch to determine how steeply your roof slopes.
For example you will need to figure out the exact number of shingles required to cover the entire roof area.
How you get shingles.
Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.
To properly calculate how.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
When figuring the amount of shingles needed to roof a house you first convert the total square footage of the roof to squares a square represents 100 square feet of area covered by shingles.
Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.
Before you start the calculation you need to be aware that shingles are sold by the square and by the bundle.
An important part of any roofing repair or replacement project is being able to accurately calculate the quantity of roofing materials required to finish the job.
Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.
A square of shingles will be the amount needed to cover an area of 100.
Our calculator will help you estimate the amount of roofing shingles needed for your project plus the cost of materials and accessories.
Although ceramic tile roofs are expensive they can have a life span of over 100 years.
Add the price per square of materials to get an estimated material cost.
Once you know this number you can estimate the final price of the materials.
Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy.
Finally increase the total by 15 to account for any waste.
It is often compared to slope but is not exactly the same.
Of course there are some measurements which will need to be taken before you are able to calculate the number of roof shingles that you need.
Singles are often sold in bundles with three bundles equaling one roof square.
Then multiply that number by 3 to figure out how many shingle bundles that amounts to since shingles typically come in a bundle that s large enough to cover 1 3 of a square.
