Valley flashings - cutting the points

Roofing · Built-Up Roofing (Tar and Gravel) · printed page 23 (PDF page 24)

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Book index entries

Dormer – Flashings Cutting the Point

Text in the illustration

water flow
clipping the shingle corners (cutting the points) is a good practice as it discourages water that is flowing down the valley from running along the top of the shingle tab

Generated explanation

The illustration shows two shingled roof planes meeting at an open valley with exposed valley flashing. A circular enlargement details the shingle edges and clipped corners alongside the flashing. Blue arrows indicate water flowing down the valley, while a prohibition symbol marks unwanted sideways flow along the top of a shingle tab. Clipping the shingle corners, described as cutting the points, is presented as good practice to discourage this lateral water movement.

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