### What Is The Roof Angle Called?

**What is the Roof Angle Called?**

**Roof angle is commonly referred to as “pitch.” Roof pitch is the steepness of a roof expressed as a ratio of inch (es) rise per horizontal foot (or their metric equivalent) or as the angle in degrees; its surface deviates from the horizontal. A flat roof has zero pitch in either instance; all other roofs are pitched. **

There are many different roof angles to choose from, each with its benefits and drawbacks. Choosing the right angle is a crucial part of building a successful roof.

Here are a few of the most common roof angles and their effects:

Flat roof: A flat roof has zero pitch in either instance; all other roofs are pitched. A flat roof is typically the least expensive to construct, but it can also be the most difficult to waterproof and heat.

Gable roof: A gable roof has a pitch of about 30 degrees, which makes it a popular choice for homes in cold climates. Gable roofs are typically more expensive to build than other roof types, but they provide more headroom and exposure to sunlight.

Hipped roof: A hipped roof has a pitch of about 45 degrees, which makes it a popular choice for homes in warm climates. Hipped roofs are typically more expensive to build than other roof types, but they provide more insulation and protection from the elements.

Corner roof: A corner roof has a pitch of about 60 degrees, which makes it a popular choice for homes in temperate climates. Corner roofs are typically less expensive to build than other roof types, but they provide less headroom and coverage from the elements.

**How Do You Calculate The Angle Of A Gable Roof?**

**Determine the roof angle of a gable using the inverse tangent of the rise divided by the run.**

**Always use the same units for both measurements. A roof with a 9:12 pitch, for example, has 9 inches of rise for 12 inches of run, hence the angle equals the inverse tangent of (9/12) = 36.9 degrees. **

This is only the pitch of the roof’s vertical rise, which is typically called “vertical pitch.” In addition, the gable roof will have a slanted, or “horizontal” rise, equal to its horizontal run.

**How Do You Convert Pitch To Angle On A Roof?**

**There are two simple steps to convert pitch to angle on a roof: – 1) Determine the pitch ratio, such as pitch = rise/run, which is 6/12 = 0.5. 2) **

**Determine the inverse tangent of the pitch to obtain the angle in degrees, such as the tan inverse of pitch = tan-1(0.5) = 26.57°, implying that a roof pitch of fraction 6/12, 2 over 12, or “6 in 12” slope, or ratio 6:12 is equivalent to 26.57 degrees of angle.**

**What Angle Roof Is Safe To Walk On?**

**Walkability is one of the most important factors when selecting a roofing system. A walkable roof has a pitch (the angle of the roof) that is less than a 7/12. Anyone can safely walk on the roof without any extra equipment. **

Most roofs with a pitch above a 7/12 are not walkable. This is because the roof’s rise (the vertical distance from the ground to the top) is greater than its run (the horizontal distance from one edge of the roof to the other). Anything above a 7/12 is considered a non-walkable roof and requires extra equipment and usually extra cost to the customer.

There are a few exceptions to this rule. For example, a gable roof with a pitch of 8/12 or a hip roof with a pitch of 9/12 is both walkable. These roofs have a rise greater than their run, but because they are shaped like a U, the user can walk around the roof.

If you are looking for a walkable roof, ask the roofing company about the roof’s pitch. If the pitch is above a 7/12, you will need to find a different roofing system.