Low Slope Roof Construction Details

Problems at these points typically arise from improper application methods and the use of inappropriate or incompatible materials.

Low slope roof construction details.

That includes soldered metal roofing or synthetic membranes. The most critical application points on low slope roof systems are at flashings penetrations and accessories. If the upper edge of a low slope shed roof intersects a vertical wall the most logical approach in my opinion is to detail the roof as an unvented roof. Regular asphalt shingles and standard skylights will work at pitches of 4 12 or greater but at lower pitches you have to use different materials.

Roof assemblies with a pitch slope of less than 3 12 are considered low slope roofs. These critical junctures account for the majority of roof leaks. These panels generally come with a painted mill finish or a clear acrylic finish. Low slope structural roofing generally used on roof pitches ranging from 12 to 3 12 consists of interlocking panels commonly called standing seam roofing that run vertically along the roof surface.

Low slope roofs are often referred to as flat roofs. The roof system is defined as the roof membrane including surfacing and the roof insulation. Roof penetrations should be kept to a minimum and should be located within the flat of the panel where possible as opposed to near seams. The roof assembly is defined as the roof deck along with the roof membrane and roof insulation.