How Much To Roof A Flat Roof

Conventional slope roof range between 4 in 12 and 8 in 12.

How much to roof a flat roof. This is the basis for calculating the angle which is approximately a 1 19 degree slope. A flat roof has a slope of 2 in 12 or less. Depending on the climate your flat roof will only last between 15 and 30 years if well maintained. There are two main categories of roofing.

Most roof s have a pitch in the 4 12 to 9 12 range. Although ceramic tile roofs are expensive they can have a life span of over 100 years. The table below shows common roof pitches and the equivalent grade degrees and radians for each. A low slope roof is anywhere from 2 in 12 to 4 in 12.

While the average lifespan for a typical roof can be 15 20 years a long hard winter or a particularly intense storm can cause lasting damage to a roof. Assuming an average roof size of 1 500 square feet that s a total cost of 2 250 to 15 000. However flat roofs require much more aggressive and consistent maintenance than a pitched roof. According to the international building code the typical built up flat roof that uses tar or asphalt goes by the guideline that for every foot 12 inches of a flat roof a minimum of inch must step up or down.

The run always remains constant at 12 inches. The actual cost of a flat roof depends on your location the materials used the complexity of the installation and other factors. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. Roofing resources during covid 19 for contractors for homeowners.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Flat roofs also don t last as long. Average cost to install a flat roof is about 16 000. If you used long lasting materials on your pitched roof you could expect it to last much longer.

It is often compared to slope but is not exactly the same. Anything more than 9 in 12 is considered steep. Building a flat roof costs approximately 5 00 to 10 00 per square foot. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.

Over time that damage could really add up.