Install Flashing and Upper Shingles

What happens here

Begin by installing the bottom rows of new or existing shingles around the base of the skylift post. Use a utility knife to carefully cut any shingles that need to fit snugly around the circular pipe of the skylift. Next, install the pipe boot flashing over these shingles. Critically, ensure that the top portion of the pipe boot's base slides *underneath* the higher course of shingles, while the lower portion of the boot's base overlaps *over* the lower course of shingles. This creates a proper watershed. The presenter demonstrates that if shingles are placed incorrectly (under the pipe boot at the top), water will run behind the boot, causing leaks. He then applies roofing cement or sealant to the edges of the flashing for an additional watertight seal and demonstrates how water correctly flows over the boot and down, away from the penetration, with water on the bracket hitting the rubber seal and being directed downwards.

Goal: Ensure watertight sealing around the roof penetration using proper shingle and pipe boot installation techniques.