This allows more valuable space for home or business owners in dense urban neighborhoods.Ĭommercial buildings are inspected frequently due to liability issues. HVAC and refrigeration components are usually installed on the roofs of commercial buildings and other flat roofing systems. Multi-family homes such as row houses or townhouses share the same roof size setbacks. Many towns have height restrictions that businesses can meet with a flat roof. A steeper roof is more difficult to design and maintain. The sheer size of many commercial buildings makes steep-sloped roofs impractical. 4 things to consider with flat roofing systems: You may have noticed: The flat roof system is often used in commercial and industrial applications. Flat roofs and low-sloping roofs don’t drain as quickly as it does with other roofing systems. You want water to flow into a gutter system and away from the foundation of your home. Water pools or puddles when there is no slope or pitch, leading to roof damage. Slope is the relationship between the roof’s rise and run, or the horizontal change in distance across your roof.
Pitch is the relationship between the roof’s rise - the vertical change in height for each horizontal unit of the roof - and span, which is the distance across your roof.Quick language lesson: Pitch and slope are terms used to describe the angles of your roof.
This allows water to run off the roof to prevent damage. It may look horizontal but often has a minimum slope of 1/4 inch per foot. That means flat roofs aren’t actually flat. What is a Flat Roof?Ī flat roof is generally any roof with a pitch of 1-10 degrees. There’s a lot to know about flat roof systems and how they work to keep your home safe and dry.
cities with older housing stock - think Federal Hill in Baltimore or Alexandria, Virginia‘s Old Town - the roofs are often flat or have very low slopes.įlat roofs make replacing a roof a challenge. Most modern residential homes have relatively steep pitches. A Comprehensive Guide to Flat Roof SystemsPublished on Tuesday April 25, 2017įlat roof systems are a bit of an outlier.
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