Residential Roof Slopes

Common roof slopes include standard designs based on residential or commercial applications.

Residential roof slopes.

Mineral surfaced roll roofing can only be installed on roof slopes of 1 12 or greater 8. The sides are all equal length and come together at the top to form a ridge. A bonnet roof with the lower slopes at a lower pitch. Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building.

Roof pitch is a measurement of a roof s slope expressed as a ratio. And smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically from. Mineral surfaced roll roofing minimum roof slope roof pitch r905 5 2. Mansard roof on a county jail.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. Roof slope is a very important aspect and it is considered the primary factor in roof design. However they can also be installed on residential houses in both high and low rainfall areas. 2 12 4 12 conventional slope roof.

Residential low slope roofing can generally be divided up into two broad categories. This roof form is a classic on some barns in the western united states. Most people don t consider the amount of available outdoor living space a flat roof can provide. I e 4 inches of rise per 12 inches one foot of run.

Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses. A hip roof has slopes on all four sides. When it comes to residential construction your roof is a visible part of the structure. Steeper slopes are ideal for areas that have higher snow loads and will also prevent the possibility of ponding water on the roof.

Roof slopes are most commonly defined by the rise over run ratio. Collegiate gothic style roof of the sage hall at cornell central campus. The popular simple hip roof is a type of roof where all four sides feature symmetrical gentle slopes towards the walls with no gables or vertical sides to the roof. The defining feature of hip roofs is that the roof faces are almost always identical in pitch making them symmetrical from the center point.

The slope of a roof has an effect on the interior volume of a building the drainage the style and the material used. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. 9 12 20 12 steep slope. Some conventional slopes are preferred for residential constructions with pitch size of 4 12 or 9 12 whereas for commercial applications low slope type roofs are a good option.