Understanding your roof s pitch and slope.
Good roof pitch slope in utah.
Because it is one of the many key elements that determine the safety of the roof over your head there is a very good reason to understand the purpose of roof pitch.
However from the wind uplift mitigation perspective a 7 12 roof slope can be considered as a two story building due to the higher overall steepness and profile of the roof.
A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof.
Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material.
Slope should be built into the structure on new buildings.
The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow.
A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.
What is the importance of roof pitch.
By knowing the pitch of your roof you will know what type of products can be used and the best ways to go about applying them.
Simply put roof pitch is the measurement of the angle or the steepness of your roof.
Cricket angles slopes are to be constructed to maintain positive slope drainage the entire distance of the valley.
A 4 12 pitch is around 18 5 degrees but not exactly.
So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12.
Roof slopes crickets are to be designed to eliminate all ponding water on the roof.
Most roof s have a pitch in the 4 12 to 9 12 range.
For example a roof with a pitch.
The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
The graphic below helps flesh this out.
The way pitch also known as roof slope is measured is rise over run.
Crickets should be installed behind all curbs that obstruct drainage.
A roof slope of 7 12 is also good and can provide the additional benefit of helping minimize the effects of wind driven rain.
If you sketch that out on paper you ll see that a roof angle of 60 degrees requires a very tall north wall or an altered plan for the greenhouse.
To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.
The pitch of the roof pertains more to the actual construction of the house whereas the slope is more relevant to the roofing of your house.
