Low slope roofs, sometimes called flat roofs, are a popular option for many commercial buildings. These roofs are not completely flat; they have a minimum slope of one-fourth inch vertical to twelve inches horizontal. This allows water to drain, even though the slope is often undetectable to the naked eye. Because a low slope roofing system cannot always control the flow of water, the entire roof must be sheathed in a watertight membrane that extends all the way to the edge. Continue reading →