Residential Roof Slopes

Mansard roof on a county jail.

Residential roof slopes.

A bonnet roof with the lower slopes at a lower pitch. When it comes to residential construction your roof is a visible part of the structure. 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. So don t completely.

However they can also be installed on residential houses in both high and low rainfall areas. 2 12 4 12 conventional slope roof. Mineral surfaced roll roofing can only be installed on roof slopes of 1 12 or greater 8. Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses.

The defining feature of hip roofs is that the roof faces are almost always identical in pitch making them symmetrical from the center point. 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. Roof slopes are most commonly defined by the rise over run ratio.

The slope of a roof has an effect on the interior volume of a building the drainage the style and the material used. A hip roof has slopes on all four sides. Collegiate gothic style roof of the sage hall at cornell central campus. Roof slope is a very important aspect and it is considered the primary factor in roof design.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. 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. A steep slope roof is one whose slope is greater than 3 12. 9 12 20 12 steep slope.

Mineral surfaced roll roofing minimum roof slope roof pitch r905 5 2. Common roof slopes include standard designs based on residential or commercial applications. I e 4 inches of rise per 12 inches one foot of run. Steeper slopes are ideal for areas that have higher snow loads and will also prevent the possibility of ponding water on the roof.

The sides are all equal length and come together at the top to form a ridge. Roof pitch is a measurement of a roof s slope expressed as a ratio. 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. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope.