When building or remodeling a home, designers and contractors carefully consider the pitch, or angle, of the roof. In some cases, the pitch is determined by the style of the home. Cape Cod-style homes typically have a steeper roof than bungalows, for example. However, the pitch is also determined by the climate and influences both the type and amount of roofing materials needed. As you weigh your options, below are some aspects to know about roof pitch.

Measuring the Pitch

When undertaking a major roofing project, the first step is to calculate the roof pitch. This is typically expressed in the ratio of rise to run, or rise/run. This refers to how many inches the roof rises per foot of horizontal run, or the length of the roof. For example, if your roof rises six inches for every foot of horizontal run, then it has a pitch of 6 in 12 or 6:12. 

To measure the pitch, you’ll need a tape measure and a level. Holding the level vertically, place it against the roof, and then tilt it toward you until the bubble indicates that it’s perfectly level. Then measure straight down from the 12-inch mark on the level. If it’s not pre-marked, measure and mark that point before you start. The distance between the level and the roof is the rise. 

Types of Pitch

The pitch of the roof is typically classified as flat, low, or steep. A flat roof has a pitch of 2:12 or less. A low roof is between 2:12 and 4:12, while a steep roof is anything higher than 4:12. The steepest a roof can get is 21:12. 

The pitch of the roof is a major factor in how the roof is made. Low roofs, for example, are typically truss roofs, which are made in factories and delivered in one piece. Cut roofs, on the other hand, are typically steeper and are made from joists and rafters. Hip roofs combine different pitches and are usually cut roofs to accommodate the different angles. 

Why Pitch Matters

The pitch of the roof is a key factor in the roofing materials you select since it plays a big role in drainage and durability. Flat roofs aren’t popular in areas that get a great deal of snow, for instance. Heavy snowfall can stress the roof, and as it melts, the water will pool. A higher angle helps the snow melt and fall off the roof. 

The pitch also affects roof maintenance. Extremely steep roofs require lightweight materials, and they are more challenging to maintain. Average pitched roofs, between 4:12 and 8:12, are the easiest to maintain and offer the most roofing material choices. 

If your home needs a new roof, turn to Quality Enterprise in Waynesboro, VA, for help. With more than 30 years of experience, they can help you choose the perfect roofing materials and design that will last for decades. Schedule a consultation by calling (540) 949-0566 or learn more about their services online.