Low Slope Roof Framing 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 roof framing details.

There are 3 main types of roofs. A framing square is traditionally used for laying out the roof and determining pitch. This is denoted two ways a 1 3 or 1 4 pitch in fractions and a 6 12 pitch in inches which means the roof rises 6 inches for each 12 inches of run. Not only can low slope metal roofing contribute to the bottom line it can also contribute to leed credits which are awarded to buildings that use high recycled content and other green construction materials.

Residential low slope roofing can generally be divided up into two broad categories. Flat low slope and steep slope a gambrel is a combination of a low and steep slope. Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses and smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically. 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.

A typical low slope metal roof has at least 25 recycled content and at the end of its long useful life is 100 recyclable. The lower slope is much steeper than the upper. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Pitch is the amount of angle or slope the roof has.

The sides can either be flat or curved depending on the style. A low slope roof design typically has a pitch of between 2 12 and 4 12. Using the space as a full. 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.

Minimum metal roof slope depends on the roof profile building design climate and site location. Flat roof has a slope of 2 12 or less it is usually. A mansard roof also known as a french roof is a four sided roof with a double slope on each side that meet forming a low pitched roof. The pitch is more relevant to the construction of the building and calculating material needs and the slope to the roof construction.

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. Typically large footprint single story. Types of the roof by slope. Low slope metal roofs require less material which reduces the overall load on the building s structure.

Finding the right products for your low slope roof. In either case find a professional roofing contractor experienced with low slope roofs and these specific products.