Asphalt Shingles - Cylindrical Penetration (Flashing, Storm Collar)

RoofStar Guarantee Standards are blue-linked

Asphalt Shingle Details

(1) Underlayment: Self-adhering or mechanically fastened, depending upon the designed slope (see 8.1.2 Design). Install “shingle-style” and overlap roll ends at least 150 mm (6”); side laps must be at least 75 mm (3”).
(2) Penetration flashing: Conforming to material standards in 11.2 Materials. Drawing shows cut-away, for illustrative purposes only.
(3) Horseshoe patch: Self-adhered membrane cut to fit penetration flashing flange and extend beyond flange edges as shown in drawing and required in 11.3.1 General.
(4) Underlayment patch: Overlaps the horseshoe patch and fits beneath the upper course of underlayment material.
(5) Drainage path (top of penetration flashing): Minimum 12 mm (1/2”).
(6) Drainage path (side of penetration flashing): Minimum 19 mm (3/4’).
(7) Exposed fasteners: Cladding fasteners with gasketed washers. See 11.3.1 General and 13.2.3 Fasteners.
(8) Storm collar: Required for pipe-type flashings (see 11.3.3 Penetrations and Vents). Caulked with an untooled bead of an acceptable sealant.

NOTE: Refer to RoofStar Guarantee Standards for additional requirements.