How Much To Roof A Flat Roof

Assuming an average roof size of 1 500 square feet that s a total cost of 2 250 to 15 000.

How much to roof a flat roof.

Average cost to install a flat roof is about 16 000. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years. Most roof s have a pitch in the 4 12 to 9 12 range. The actual cost of a flat roof depends on your location the materials used the complexity of the installation and other factors.

Depending on the climate your flat roof will only last between 15 and 30 years if well maintained. The run always remains constant at 12 inches. Roofing resources during covid 19 for contractors for homeowners. Although ceramic tile roofs are expensive they can have a life span of over 100 years.

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. The table below shows common roof pitches and the equivalent grade degrees and radians for each. 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.

Anything more than 9 in 12 is considered steep. If you used long lasting materials on your pitched roof you could expect it to last much longer. There are two main categories of roofing. A flat roof has a slope of 2 in 12 or less.

This is the basis for calculating the angle which is approximately a 1 19 degree slope. Find here detailed information about flat roof installation costs. Conventional slope roof range between 4 in 12 and 8 in 12. Over time that damage could really add up.

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. 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. Building a flat roof costs approximately 5 00 to 10 00 per square foot. However flat roofs require much more aggressive and consistent maintenance than a pitched roof.

A low slope roof is anywhere from 2 in 12 to 4 in 12.