24-gauge galvanized base | Fits any roof pitch to 45° (1½" and 2" vent pipe allow for a pitch range beyond 45°) Tested for ultraviolet, ozone and weather resistance | Approved for type “B" installations | Elastomer collar heat tested to 180°F | Multi-size flashing fits 1¼" – 3" | Limited Lifetime Warranty for the life of the current roof system. Fits pipes between 1 1/4 inch to 3 inch pipes.
10-3/4″x 14-1/2″ Base – Mill Finish GB31 20 units per case
10-3/4″x 14-1/2″ Base – Brown GB31BROWN 20 units per case
10-3/4″x 14-1/2″ Base – Black GB31BLACK 20 units per case
10-3/4″x 14-1/2″ Base – Gray GB31GRAY 20 units per case
1. Select appropriate size flashing for each vent pipe through roof. Seal the underside of the flashing as shown below.
2. Install flexible collar* over pipe.
3. Push down until base lies flush on rooftop.
4. Nail flashing only where future courses of shingles will cover.
5. Shingle around the bubble of the flashing (cutting where necessary so all shingles are flat on the roof). The shingles should be installed at least halfway down the flashing base so there are no exposed nail heads.
300 units weight 366 pounds.
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