Low Slope Roof Framing Details

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.

Low slope roof framing details.

Minimum metal roof slope depends on the roof profile building design climate and site location. There are 3 main types of roofs. Residential low slope roofing can generally be divided up into two broad categories. Types of the roof by slope.

The lower slope is much steeper than the upper. A framing square is traditionally used for laying out the roof and determining pitch. A low slope roof design typically has a pitch of between 2 12 and 4 12. 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.

Low slope metal roofs require less material which reduces the overall load on the building s structure. The pitch is more relevant to the construction of the building and calculating material needs and the slope to the roof construction. Using the space as a full. 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.

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. 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. 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. 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.

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. Finding the right products for your low slope roof. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. A typical low slope metal roof has at least 25 recycled content and at the end of its long useful life is 100 recyclable.

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. 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. Flat low slope and steep slope a gambrel is a combination of a low and steep slope. Typically large footprint single story.

The sides can either be flat or curved depending on the style. Pitch is the amount of angle or slope the roof has.