A half-circular shaped opening in a lapped edge or seam, caused by wrinkling or shifting during installation.
A projecting rim or edge used for strength or for attachment to another object.
A thin piece of metal used to prevent water seepage into a building.
A device used to seal around projections extending through the roof.
The triangular portion of a wall between the edges of intersecting roof pitches.
A device designed to prevent loose aggregate from washing off the roof.
A channel at the edge of the roof for carrying off rainwater.
The external angle formed by the intersection of two sloping roof planes.
Shingles used to cover the inclined external angle formed by two sloping roof planes.
A mass of ice that forms along the lower edge of rooflines in climates subject to freezing temperatures.
