Low Slope Roof Framing

We had ice damage which forced the roof repair but because it was in the winter only the lower half of the 23 12 area was repaired.

Low slope roof framing.

Measure the outline of the structure to be roofed with a tape measure or get dimensions from a house plan. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. There are several variables to consider when determining the proper rafter size. See low slope roofing.

Low slope roofing is defined as any roof pitched at 3 in 12 or 14 degrees or 25 slope or less. 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. Continuous insulation on top of the deck. This sizing guide for roof rafters will help determine what you need for your small project.

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. Standing water is a primary source of roof cover discoloration and deterioration that may result in framing member damage and contribute to premature failure of the structural system on low slope roofs. Also see modified bitumen roofing. Low slope roofing in other texts refers to roofing systems for pitches below 4 in 12 of slope.

à highlight detailing best practices for vented low slope roofs to avoid moisture traps and ensure material longevity. When design constraints necessitate a 1 4 in 12 design slope be used the framing members should be cambered or investigated for ponding. Flat low slope and steep slope a gambrel is a combination of a low and steep slope. Select an angle of slope away from a house into an area with good drainage.

Frame assembly affect moisture presence movement and evaporation. Step 1 use prefabricated mono trusses for the easiest and best framing on a single slope roof. And see roll roofing asphalt sbs. Flat roof has a slope of 2 12 or less it is usually covered with metal or a membrane.

à explore the differences in enclosure design and ventilation requirements for roofs with attic insulation vs. Very little to no wind force but very slow to shed snow or rainwater. 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.

We have a low slope shed roof that was repaired with roll roofing as an emergency patch in 2014. The key to a good single slope roof is strong framing underneath. Pitch is the amount of angle or slope the roof has. Types of the roof by slope.

There are 3 main types of roofs.