The formula to calculate the total length of drip edge needed is:
\[ DE = (2 \times L) + (2 \times W) \]
Where:
A drip edge is a metal flashing or strip installed at the edges of a roof to direct water away from the fascia and into the gutters. It is designed to prevent water damage to the roof deck, fascia, soffit, and the home’s foundation. It also helps to protect shingles from water damage and prevents wind-driven rain from getting underneath the roof covering.
Let's assume the following values:
Using the formula:
\[ DE = (2 \times 40) + (2 \times 20) = 80 + 40 = 120 \text{ feet} \]
The Total Length of Drip Edge Needed (DE) is 120 feet.
