Demonstrating Water Management and Shingle Adhesion

What happens here

This step visually demonstrates two critical aspects of roof integrity: water management and shingle adhesion. First, water is poured onto the 'Step Flashing' to show how it effectively channels water down the roof surface, even without an overlapping shingle, directing it towards the gutter. Then, water is poured onto properly installed 'Shingles' to illustrate how their overlap and correct positioning allow water to flow efficiently over each shingle course and into the 'Gutter', preventing water from backing up against the fascia. The presenter then peels back a shingle to reveal the tar strip on the 'Starter Strip'. This tar strip adheres to the shingle above it, creating a strong bond that prevents the shingles from lifting due to wind, thereby protecting the roof from wind uplift.

Goal: Verify effective water runoff and shingle wind resistance.