I cover this in great detail in my short book. The shingles at the peak of your roof are commonly called cap shingles. If your shingles are standard three-tab shingles, the caps are made by ...

IKO Roof-Fast™ Cap is a self-adhered, polymer-modified cap sheet constructed of a durable, reinforcing mat of nonwoven glass fibers that have been coated and permeated before applying mineral ...