A drip edge is a piece of material that is installed along the edge of a roof to help prevent water from getting underneath the shingles and into the roof decking or fascia board. It is typically made of metal or plastic and is installed under the first row of shingles and over the fascia board.
Here are a few reasons why a roof needs a drip edge:
- Prevents water damage: The primary function of a drip edge is to prevent water from getting under the shingles and into the roof decking or fascia board. Without a drip edge, water can seep into these areas and cause damage, including rot and mold growth.
- Helps direct water away from the roof: A drip edge also helps to direct water away from the roof and into the gutters. This is important because when water collects on the roof, it can cause damage over time, including leaks and water damage.
- Protects the shingles: A drip edge also helps to protect the shingles from wind damage. Without a drip edge, wind can get underneath the shingles and cause them to lift up or blow off completely.
Overall, a drip edge is an important component of a roofing system, as it helps to prevent water damage, directs water away from the roof, and protects the shingles from wind damage.