Roof Pitch Identifier

The fiberglass mat used in today s asphalt shingles used to be an organic felt mat consisting of wool cellulose wood fiber or waste paper.

Roof pitch identifier.

Example a the measurements are taken from on top of the roof. The 7 means that the roof rises 7 for every 12 it runs. A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. This johnson pitch and angle locator is made of black high impact plastic.

The example to right shows 2 different ways to determine or calculate roof pitch also called roof slope. You can use it to identify roof pitch stair slope or drainage angles. Typically a parapet greater than 24 inches above the roof surface. A flanged enclosure made of sheet metal or other material placed around a penetration through the roof.

If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Some sources consider low slope to include 3 12 pitch roofs. Notes to the table above. Sometimes pitch is also expressed in.

Half of the scale is printed in 0 to 90 degrees in 2 quadrants. Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss. The johnson level tool pitch and slope locator is designed for carpentry plumbing electrical or hvac work requiring accurate pitch or slope identification. A device used to elevate gas pipes electrical conduit ductwork etc.

Typically a parapet 24 inches or less above the roof surface. Above the drainage plane of the roof. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. You may have also heard of organic roof shingles.

This tool is for carpentry plumbing electrical or hvac work that requires accurate pitch or slope identification. Our tool allows you to outline roofs identify roof features edges identify the pitch of each facet and add pins to roof attributes that will help you price your roofing project. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement. It s ideal for identifying roof pitch stair slope or drainage angles.

Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. Reduce the need for on site visits. Also different architectural styles will use the same type of roof. Asphalt roll roofing is still used today on residential roofs with a low roof pitch commercial buildings and outbuilding applications.