Estimating Ridge Cap & Valleys

Linear Feet & Waste Factor Walkthrough

Ridge cap and valley material are commonly under-ordered, leading to extra trips to the supply yard mid-job. This article shows how to measure linear feet of ridges, hips, and valleys directly from the roof plan, apply standard coverage rates (22-25 LF per ridge cap bundle, 50 LF per valley roll), and add a 10% waste factor for cuts. Includes worked examples for both gable and hip roofs and links to our Ridge Cap and Valleys calculators.