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What Is The Slope Of A Commercial Roof?

What Is The Slope Of A Commercial Roof

Often between 1/4 to 1/2 inch per foot, qualifying as low-slope or “flat” roofs.

The slope is typically expressed as a ratio or angle…

  1. Low Slope – Commercial roofs with a low slope have a gentle incline, typically ranging from 1:12 to 4:12. This means the roof rises 1 to 4 inches vertically for every 12 inches horizontally. Low-slope roofs are common in commercial buildings and are designed to allow for effective drainage of rainwater.
  2. Steep Slope – Some commercial buildings may have roofs with a steeper slope, which can range from 4:12 to 12:12 or higher. Steep-slope roofs have a more pronounced incline, allowing for more efficient drainage and often providing architectural interest.

The specific slope of a commercial roof will depend on factors such as the building’s design, climate considerations, local building codes, and the type of roofing material used.


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