If water pools on the roof, it can quickly deteriorate a modified bitumen roofĮPDM is the most common thermoset roof membrane and is applied in large sheets.Doesn’t have protective granules for UV rays.It’s very thick which can resist punctures (great for foot traffic).There are no seams which means less opportunity for leaks.Easily expands and contracts without cracking or losing its shape.A white “cool roof” can be applied to reflect sunlight making it even more energy-efficient.It can also be applied as a layer of hot asphalt. Its first base layer is adhered to the roofing substrate or deck, then a top cap sheet can be torched, cold applied, or self-adhered. Modified Bitumen is similar to BUR as it’s also asphalt-based, but it has far fewer layers and the application is a bit different. Installation is slower and more labor-intensive which can drive up costs.Heavier than other roofing materials so requires a stronger roof deck.Multi-layered protection- if one is damaged the others below it pick up the slack.Can last 20-30 years with proper maintenance.Excellent at resisting UV rays and weathering.The top layer is then finished with a gravel or mineral surface. It’s composed of multiple layers (usually between three and five) of asphalt that is alternated with reinforcing fabrics and adhesives. One of the oldest types of low slope roofing systems, BUR has been around for well over 100 years. We’ll dive into the pros and cons of each and determine which is the best for either residential or commercial roofs. While these aren’t the only options to you, they are very commonly used and are intended for such an application. Ethylene Propylene Diene Monomer (EPDM).Instead, you should consider one of the 4 main types of flat roof materials: You are just asking for a leak to happen if you install conventional roofing material on your low-slope roof. While technically you could install an asphalt shingle roof on a low slope, we do NOT recommend it. The Best Materials for a Low Slope Roof (Pros and Cons) While these challenges sound severe, they can be combated by utilizing the best roofing material available to you that is meant for a low-slope roofing solution. This wear and tear can cause fading and cracking. A low slope roof, however, sees the sun for the majority of the day which means it can experience extensive UV degradation. It gets shadows cast that can cool it down from being in the high noon sun. Most likely your moderate or steep pitched roof only gets sun for a part of the day. So if you have a larger area low slope roof, a lighter material like rubber or PVC. Some low slope roofs have a much larger surface area and the roofing materials will cause a greater weight on the roof, which can lead to risks of sagging and deterioration. So it’s vital to have the best material possible that will not allow pooling water to stick around. The pooling water can cause leaks in the roof system as well as create areas where moss and algae can grow. We just talked about how low-slope roofs can have standing water due to the slow drainage, but this also creates other problems. So a low slope roof needs to have a system in place that can handle this increased pooling of water. With the minimum slope of a low slope roof, that water is going to take much longer to drain, if at all. The steeper the slope, the faster water and snowmelt can shed off a roof. So shingles are not usually the ideal option in this case. This means that the roofing system needs to be able to withstand this increased activity without breaking down. Since low slope roofs are more accessible or even utilized as rooftop patios, etc., they can receive more foot traffic than steeper roofs. Other challenges of a low slope or flat roof include: More Foot Traffic Roofing systems that rely on sufficient drainage for successful performance, such as slate or asphalt shingles, are not utilized on low slope roofs since they drain water more slowly than moderate or steep-sloped roofs.
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