Residential Roof Slopes

I e 4 inches of rise per 12 inches one foot of run.

Residential roof slopes.

Mineral surfaced roll roofing minimum roof slope roof pitch r905 5 2. A hip roof has slopes on all four sides. Most people don t consider the amount of available outdoor living space a flat roof can provide. Roof pitch is a measurement of a roof s slope expressed as a ratio.

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. This roof form is a classic on some barns in the western united states. The slope of a roof has an effect on the interior volume of a building the drainage the style and the material used. 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.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. Roof slopes are most commonly defined by the rise over run ratio. 9 12 20 12 steep slope. The sides are all equal length and come together at the top to form a ridge.

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. The defining feature of hip roofs is that the roof faces are almost always identical in pitch making them symmetrical from the center point. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. However they can also be installed on residential houses in both high and low rainfall areas.

Mineral surfaced roll roofing can only be installed on roof slopes of 1 12 or greater 8. Residential low slope roofing can generally be divided up into two broad categories. 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.

Roof slope is a very important aspect and it is considered the primary factor in roof design. 2 12 4 12 conventional slope roof. 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. Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses.

So don t completely. 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. Common roof slopes include standard designs based on residential or commercial applications.