Installation Guide for Tower™ Roofing

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10. Installing Around Protrusions

Note: Install Ice and Water protector as described in section 6 (Underlayment).

Install the field shingles up to the protrusion such that the bottom flange of the flashing for the protrusion (vent, exhaust vent, bathroom vent, etc.), will extend onto the surface of the field shingles such that there is no headlap of the field shingles being exposed. Once the field shingles are brought up high enough, the protrusion flashing is installed.

The next course of shingles will now be installed to cover the side and top portions of the flange of the protrusion cap.

When the protrusion is wider than a shingle, ensure that the shingles are offset as required to get the proper overlap across the entire roof. Caulk the cut edges of the shingles at the juncture between shingle and the flange with an exterior grade silicone or urethane caulking, as well as any exposed fastener heads in the flange (refer to detail 006).

Detail 006: Protrusion Detail

If a chimney is not at the peak, but is fully on the slope of the area you are working on, ensure that the ice and water protector is installed as described in section 6 (Underlayment), put in the proper flashing materials and caulk appropriately. Then use starter shingles on the side of the chimney that would have water hitting the chimney as it comes down the roof during a rain storm. Treat this area as an eave, except that some of the exposure of the shingles may have to be trimmed (and caulked) to ensure that the course of shingles continues in a straight line.

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