What Roof Slopes are Suitable for Roll Roofing?

Roll roofing is a great option for roofs with a minimum slope of 2 inches of increase in 12 inches of horizontal or steeper travel. The installation process for this type of roofing is different depending on the roof's slope. It is relatively easy to install on a low-sloped roof, but for a pitched roof, the roofing method with exposed nails is recommended. Building codes set the minimum allowable slope for a material in general, but some roofing products may have different recommended minimum slopes.

The International Residential Code (IRC) regulates the minimum roof slope (roof slope) required for each type of roofing material. The minimum roof pitch for a roofing material or system is intended to ensure that the roof works as it should. Sloped-out roofs are less likely to allow wind-blown rain to penetrate below the shingles or shingles and filter through the roof cover. It is especially important to pay attention to the manufacturer's recommendation on a minimum slope when using metal roofing products, such as roofing systems with vertical joints, “metal tiles” and other types of metal roofing panels. The lowest slope allowed by the code for any type of roof is 1 in 12 (0.60 degrees), and it only applies to sloped roof systems with coal tar.

The steeper the roof slope, the lower the chance of water accumulating; however, the roofing materials set forth in Chapter 9 must meet the minimum requirements for each type of material. When the roof surface has a lower slope, water drainage tends to be slow, increasing the chance of water entering underneath the roofing material. The parts of the code that affect the minimum roof pitch rarely change, but these changes may affect the minimum roof pitch requirements in your area. The minimum slope requirements vary depending on the roofing material. As an expert in this field, I can tell you that a steeper roof will generally perform better and last longer than a roof with a lower slope. Gray has worked in the roofing industry for more than 25 years and has experience in all aspects of roofs, from safety and inspection to design specification and asset management. So, can roll-up roofs be used on sloped roofs? Yes! Roll-up roofs can be used on sloped roofs as long as they meet the minimum slope requirements set forth by building codes.