Roof pitch refers to the steepness or slope of your roof. It’s expressed as a ratio, such as 4/12 or 6/12.

The first number represents how many inches the roof rises for every 12 inches of horizontal run.

Why Roof Pitch Matters

• Determines drainage speed

• Affects material selection

• Impacts ventilation design

• Influences installation method

Low-Slope Roofs

Low-slope roofs require different waterproofing methods because water drains more slowly.

Steep-Slope Roofs

Steeper roofs shed water quickly but experience greater wind uplift pressure.

Why Roofers Calculate Pitch

Proper pitch measurement ensures materials are installed correctly and code-compliant.