Flat Roof vs Low-Slope Commercial Roofs

When you construct a commercial building, one of the most challenging questions you have to deal with is whether to install a flat roof or a low-slope roof. In Texas, the roof design you choose for your commercial building is very critical. This is because of the harsh weather conditions experienced in the state throughout the year, including heavy rains, snow, and extreme heat.

So, when choosing a roof for your commercial building, you need to go for a roofing system that will offer your structure the required protection against these elements. So, between a flat roof and a low-slope roof, which one should you install on your commercial building? Continue reading to know the pros and cons of flat and low-slope roofs for commercial buildings.

Flat Roof

Although the name suggests that it is flat, a flat roof is not entirely flat. Most flat roofs have a slight, almost invisible slope that helps move rainwater toward the gutter system. Flat roofs are commonly used on commercial buildings. One of the benefits of installing a flat roof on your commercial building is that you will enjoy a low, upfront cost. This type of roof is inexpensive to install because it requires fewer roofing materials and has a simple structure.

A flat roof also offers a more solid space that can be used for many other purposes. Although it features a triangular attic, its top surface provides you enough space that is almost the same size as the floor beneath it, which can serve as an extra floor.

Again, a flat roof offers clean, straight, and simple lines that add modern aesthetic appeal to your commercial roof. This type of roof is the latest style for most commercial buildings. However, a flat roof has a shorter lifespan and requires continuous maintenance.

Low-Slope Roof

A low-slope roof refers to a roof with a 3/12 pitch. A pitch is the roof’s fall over 12 inches. In other words, any roof with a pitch that falls one inch over 12 inches is considered very low (almost flat). Therefore, a low-slope roof should have at least a 4/12 pitch. One of the benefits of a low-slope commercial roof is that it allows rainwater to drain quickly and effectively.

It also provides a safe environment for regular maintenance and inspection. A low-slope roof is not expensive to install since it uses the same roofing materials used in flat roofs. Unfortunately, this type of commercial roof has a very high rate of deterioration and requires regular maintenance.