In my reports, I address flashing details (or the lack, thereof) quite often. Considering we live in a very wet environment, this makes perfect sense.

Today, I’d like to discuss metal drip-edge flashing details briefly. A drip-edge flashing detail is a material applied on a roof’s edge that gives the roof system more capacity to direct water away from the system.

Why is drip-edge flashing important? Well, lots of reasons, including:

• Insects and small pests are better deterred from infesting a roof system

• Water is better directed into building gutter systems and away from exteriors and foundations

• Shingles are better shielded from water damage

• Underlying rooflines are better protected from rot

I recently came across a home in Langley that was lacking drip-edge flashing. As a result, some of the roof system’s OSB sheathing was swelled and deteriorated. I advised them to address this as soon as possible.

If you have questions or comments about roofing systems or home inspections in general, tweet me (@AIHomeInspect).