Low Slope Roof Framing Details

Many times the low slope is dictated by the building geometry.

Low slope roof framing details.

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. Resso concurs that low slope metal roofing differs from steep slope roofing in that resistance to water infiltration through panel seams is an even more crucial aspect of the system design. Just like any other roofing system low slope roof designs will have several effects on the overall construction of the building including the interior volume the style and design of the house the drainage system and the material used for covering. In either case find a professional roofing contractor experienced with low slope roofs and these specific products.

Flat roof has a slope of 2 12 or less it is usually. 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. The most critical application points on low slope roof systems are at flashings penetrations and accessories. Wide width roof areas that simply must be lower slope to limit the overall height of the roof building as a practical matter he says.

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. Flat low slope and steep slope a gambrel is a combination of a low and steep slope. Designers and specifiers should pay close attention to roofing details in these areas and. The pitch is more relevant to the construction of the building and calculating material needs and the slope to the roof construction.

Problems at these points typically arise from improper application methods and the use of inappropriate or incompatible materials. Low slope metal roofs have been a preferred roof covering for commercial institutional and industrial buildings for years because of their ability to protect against the elements to allow water to drain away from the roof surface and to keep building contents and occupants dry and comfortable. There are 3 main types of roofs. These critical junctures account for the majority of roof leaks.

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. Types of the roof by slope.