Asphalt Shingles - Diverter Flashing

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Asphalt Shingles - Diverter Flashing

Revision as of 20:56, 7 September 2021 by James Klassen (talk | contribs)

Division D - Construction Details

ASh 10.1.2 Diverter Flashing

Notice to Reader
Images used in a Construction Detail are representative and not prescriptive. Nor are they necessarily drawn to scale. Rather, they are provided to visually convey the requirements of the Standard they represent. Unless otherwise required by the Standard, dimensions, the selection of materials and their application remains the responsibility of the Design Authority.

The full text of the referenced requirements in the Standard may be read by using the blue hyperlinks
Asphalt Shingle Details
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ASh 10.1.2-1 CD.jpg ASh 10.1.2-2 CD.jpg
ASh 10.1.2-3 CD.jpg ASh 10.1.2-4 CD.jpg


(1) Step 1
Use a standard 225 mm (9”) long step flashing and scribe the fold lines as shown on the illustration. Note that the down-slope upstand is bent at a 110-degree angle to the slope. No cutting is needed or appropriate; the flashing is formed with folds, bread-pan style.
(2) Step 2
Fold the bottom end of the flashing as illustrated, so that the bottom upstand aligns with the vertical bread-pan fold made in the next step.
(3) Step 3
Fold the back flap around and behind the main upstand, bread-pan style.
(4) Step 4
If required or desirable, cut a capillary notch in the bottom upstand (illustrated), and trim the upstand to suit the aesthetics of the roof.



NOTE: See the Standard for additional requirements.

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