Low Slope Roof Details

Designers and specifiers should pay close attention to roofing details in these areas and.

Low slope roof details.

Generic valley treatment details for metal panel roofs for low slope with and without substrates are included in the mbma metal roofing systems design manual chapter 12 metal roof details. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. By low slope roofing we mean any roof that is pitched at less than 4 inches of rise in 12 inches of run or 4 12 pitch. Resilient synthetic rubber membrane widely used on low slope roofing projects for over 50 years in the united states and worldwide.

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. These critical junctures account for the majority of roof leaks. I don t know how large your roof area is but at an 1 8 to 12 slope you will have water ponding on it. No endlaps a good idea because of the low slope.

However the slope is below this industry s manufacturer s 1 4 to 12 recomendation. Eric sounds like a well thought out roof system. Low slope metal roofs have simple geometries and are easier and less expensive to install that medium to steep slope roofs. The most critical application points on low slope roof systems are at flashings penetrations and accessories.

Low slope metal roofs provide years of low cost low maintenance performance. Use of copper due to the location is a good idea. Problems at these points typically arise from improper application methods and the use of inappropriate or incompatible materials. Low slope metal roofs require less material which reduces the overall load on the building s structure.

Installation is important when it comes to putting a single ply roofing system on a building. As in all construction work paying attention to the little details can make all the difference between a long lasting trouble free project and one that results in callbacks and early failure never a good option with a new england roof. 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.