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Flat Roof Type

Flat Roof

Flat Roof NextHouse

Garage with Flat Roof

Flat roofs may have a slight slope to assist in the shedding of water or be just as described “flat”. Flat roofs are typically a more economical roof to build given that it requires less material. While being cheaper to intially build a flat roof will require re-roofing more often with many materials lasting 10-20 years versus 25-50 years for many pitched rof materials.

Flat roofs are susceptible to failure if pooled water is left for long periods of time. Most recent flat roofs are covered by a continuous membrane to help prevent such water pooling. Still, flat roofs are not an ideal choice for areas that get a lot of rain and/or snow.

The most common flat roof materials are:

• Roll Roofing
• Built-up roof/ Tar and Gravel
• Modified Bitumen
• Rubber Membrane
• Metal Sheets
• Green Roofs

Flat roofs have traditionally been very popular in dry climates including the Southwestern portion of the United States.

See more roof types.