Where should the drip edge be installed at the eave relative to the underlayment?

Where should the drip edge be installed at the eave relative to the underlayment?

• A. Over the underlayment
• B. Beneath the underlayment
• C. Behind the siding
• D. Inside the roof deck

Answer: (B)

The correct placement for the drip edge is beneath the underlayment at the eave. This approach is essential for ensuring that any water that runs off the roof is directed away from the underlayment and the underlying structure. By installing the drip edge beneath the underlayment, it allows for proper water drainage and helps to prevent moisture infiltration into the roofing materials and eventually into the home. If the drip edge were placed over the underlayment, water could potentially get trapped beneath it, leading to issues with water damage and rot. The other placements, such as behind the siding or inside the roof deck, do not serve the intended purpose of the drip edge, which is specifically to guard the eave from water intrusion and direct runoff effectively away from vulnerable areas of the roofing system.

The correct placement for the drip edge is beneath the underlayment at the eave. This approach is essential for ensuring that any water that runs off the roof is directed away from the underlayment and the underlying structure. By installing the drip edge beneath the underlayment, it allows for proper water drainage and helps to prevent moisture infiltration into the roofing materials and eventually into the home.

If the drip edge were placed over the underlayment, water could potentially get trapped beneath it, leading to issues with water damage and rot. The other placements, such as behind the siding or inside the roof deck, do not serve the intended purpose of the drip edge, which is specifically to guard the eave from water intrusion and direct runoff effectively away from vulnerable areas of the roofing system.