Residential Roof Slopes

The sides are all equal length and come together at the top to form a ridge.

Residential roof slopes. Collegiate gothic style roof of the sage hall at cornell central campus. A steep slope roof is one whose slope is greater than 3 12. Common roof slopes include standard designs based on residential or commercial applications. 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 from. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. I e 4 inches of rise per 12 inches one foot of run. When it comes to residential construction your roof is a visible part of the structure.

This roof form is a classic on some barns in the western united states. However they can also be installed on residential houses in both high and low rainfall areas. 2 12 4 12 conventional slope roof. The slope of a roof has an effect on the interior volume of a building the drainage the style and the material used.

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. If a roof slope rises say 4 inches when measured 12 inches along the bottom of a horizontal roof truss the roof slope is said to be 4 12. Residential low slope roofing can generally be divided up into two broad categories. Mansard roof on a county jail.

Mineral surfaced roll roofing minimum roof slope roof pitch r905 5 2. 9 12 20 12 steep slope. Mineral surfaced roll roofing can only be installed on roof slopes of 1 12 or greater 8. Roof slopes are most commonly defined by the rise over run ratio.

Most people don t consider the amount of available outdoor living space a flat roof can provide. 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. A hip roof has slopes on all four sides. The defining feature of hip roofs is that the roof faces are almost always identical in pitch making them symmetrical from the center point.

Steeper slopes are ideal for areas that have higher snow loads and will also prevent the possibility of ponding water on the roof. Roof slope is a very important aspect and it is considered the primary factor in roof design. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. A bonnet roof with the lower slopes at a lower pitch.