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## What is the most common roof pitch angle?

The most commonly used roof pitches fall in a range between 4/12 and 9/12. Pitches lower than 4/12 have a slight angle, and they are defined as low-slope roofs. Pitches of less than 2/12 are considered flat roofs, even though they may be very slightly angled.

## What is the correct pitch for a roof?

Conventional slope roofs, with a pitch between 4/12 and 9/12, are the most common in residential work. Roofs with a pitch exceeding 9/12 (37 degrees) are termed steep slope roofs.

## How do you determine the angle of a pitched roof?

How to Calculate Roof Pitch in Degrees

- First, you need to measure the run of your roof. …
- Next, you need to figure out the rise. …
- Now, divide the rise by the run. …
- Then, divide 1 by your tangent.
- Finally, multiply this result by 180/π and you’ve calculated your roof pitch!

## What roof pitch is 20 degrees?

Chart: Slopes in Degrees Converted to Standard Roof Pitch

Convert Roof Slope from Degrees to Rise-in-Run | |
---|---|

18° | 3.899 in 12 |

19° | 4.132 in 12 |

20° | 4.368 in 12 |

21° | 4.606 in 12 |

## What roof pitch is considered steep?

OSHA defines a “steep roof” as any roof with a rise/run ratio over 4:12 (18.43 degrees). While most standard-pitched residential roofs seldom exceed a 12:12 pitch (45 degrees), the landscape is occasionally marked by a design which harkens back to earlier times, when much greater roof pitches were more common.

## What roof pitch is 30 degrees?

A 30° roof pitch is roughly the same as a 7/12 roof pitch. To convert from degrees to the American ratio: Find the tangent of the angle, tan(angle). This gives you the pitch of the roof.

## What does a 2 12 roof pitch look like?

A 2/12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Simply put, it’s a shallow roof. … A roof this shallow is likely to be found on a ranch house, a shed dormer or a porch.

## Is a 7/12 roof pitch walkable?

The roof’s pitch is the angle of the roof, usually presented as the inches of vertical “rise” over 12 inches of horizontal “run.” Generally anything above a 7/12 is considered a non-walkable roof and requires some extra equipment and usually some extra cost to the customer.

## What is the minimum roof pitch?

Smallest Roof Pitch

The smallest pitch of a roof is 1/4:12, which translates to 1/4 inch rise to 12 inches of run. Such a small pitch can only work with built-up roofing or specialized synthetic roofing. Covered porches that are near trees or in areas with heavy rains should not be covered with a low-slope roof.

## What pitch is a 10 degree roof?

Roof Pitch and Corresponding Angles

Roof Pitch (slope) | Roof Angle (degree) |
---|---|

7:12 Pitch | 30.26° |

8:12 Pitch | 33.69° |

9:12 Pitch | 36.87° |

10:12 Pitch | 39.81° |

## What is a 12 12 roof pitch?

In this pitch, the first twelve is your roof’s rise and the second twelve is the roof’s run. … The roof’s incline increases 12 feet for every 12 feet of horizontal measurement.

## How many degrees is a 7 12 pitch?

For example a 7:12 roof pitch means that for ever 12″ of horizontal distance the roof will increase in height by 7″. The following diagram will let you easily convert roof pitch to degrees; a 7:12 pitch equals 30.26 degrees.