Rafter rise run this formula is from the pythagorean theorem.
Flat roof estimate calculator.
Conventional slope roof range between 4 in 12 and 8 in 12.
The smallest pitch of a roof is 0 5 12.
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.
Flat roof costs 8 000 16 000 depending on the material you choose.
The average cost to replace a flat roof is 5 10 per square foot installing a simple 1 600 sq ft.
A common choice for flat roofing material is epdm rubber as it is highly durable waterproof and can be made from recycled materials.
Our calculator will estimate your total roofing cost installed including the cost of materials labor and warranty for any major type of roof including 3 tab asphalt shingles architectural and premium composition shingles pvc tpo epdm rubber built up roofs cedar shakes and shingles clay tiles natural slate and metal roofing.
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 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.
The run always remains constant at 12 inches.
The following tools estimate the area of a roof as well as the amount of materials necessary to construct a roof of a given area.
A flat roof has a slope of 2 in 12 or less.
You can also calculate roof pitch even without using a roof slope calculator.
The house base area is the area of land that the house covers and for more complex shapes can be estimated using the area calculator.
There are two main categories of roofing.
Use the following formula which also describes a right triangle.
When installing new roofing there are many factors to consider when estimating price.
A low slope roof is anywhere from 2 in 12 to 4 in 12.
Anything more than 9 in 12 is considered steep.
Roof shingles calculator estimates roof area materials and installation costs of asphalt shingles for gable and hip roofs.
Flat roof calculator quickly estimates the total cost to install the following roofing.
Flat roof calculator estimates replacement costs of low slope flat roofs single ply membranes epdm rubber pvc tpo and built up roofs tar gravel modified bitumen as well as insulation parapets.
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.
Here are the equations you may use to solve for the length of the slope and the rafter.
A completely flat roof is a poor design as water and snow will collect on it eventually leading to your roof collapsing in from the weight of it all.
