Step Flashing a Shingled Roof is an extra step for your assurance. The main advantage to step flashing your shingled roof is that it provides superior protection against water leaks at the intersection of your roof and walls. Step flashing is a type of flashing that is installed in layers, with each layer overlapping the one below it. This creates a watertight seal that prevents water from seeping in behind the shingles.
Here are some of the specific advantages of step flashing shingled roofs:
Protects against water leaks: Step flashing creates a waterproof and flexible seal between 2 different materials. It allows the roof and the wall (whether it’s a chimney or a wall) to shrink and expand in heat and humidity yet still remain watertight.
Overall, step flashing is a relatively inexpensive and easy way to improve the performance and longevity of your shingled roof. It is highly recommended by roofing professionals as a best practice for shingled roof installation.