How should a drip edge be applied at the rake?

How should a drip edge be applied at the rake?

• A. Beneath the underlayment
• B. Over the underlayment
• C. Underlayment only
• D. Not used

Answer: (B)

Applying a drip edge at the rake over the underlayment is the best practice to ensure effective water management and protection of the roofing structure. When the drip edge is installed over the underlayment, it helps direct water run-off away from the underlying materials, preventing water from seeping under the roofing system, which could lead to leaks and water damage over time. Having the drip edge on top also allows it to shed water immediately down and away from the roofline. If it were installed beneath the underlayment, any water that might work its way under the shingles could bypass the drip edge entirely, leading to potential issues such as mold growth or wood rot in the roof's structure. This approach also aligns with industry standard practices and building codes that emphasize the importance of proper roofing installation techniques for longevity and efficiency. The other options either don't provide the necessary protection or imply improper installation practices, which can compromise the integrity of the roofing system.

Applying a drip edge at the rake over the underlayment is the best practice to ensure effective water management and protection of the roofing structure. When the drip edge is installed over the underlayment, it helps direct water run-off away from the underlying materials, preventing water from seeping under the roofing system, which could lead to leaks and water damage over time.

Having the drip edge on top also allows it to shed water immediately down and away from the roofline. If it were installed beneath the underlayment, any water that might work its way under the shingles could bypass the drip edge entirely, leading to potential issues such as mold growth or wood rot in the roof's structure.

This approach also aligns with industry standard practices and building codes that emphasize the importance of proper roofing installation techniques for longevity and efficiency. The other options either don't provide the necessary protection or imply improper installation practices, which can compromise the integrity of the roofing system.