On Sunday I wrote a post on roof vent flashing installations. I asked the question, " What's wrong with this installation?" Jay Markanich a home inspector in the state of Virginia, hit the nail on the head. The job of home inspectors is not only to point out the condition of the systems and components in the home, but to also determine if the systems and components are installed correctly. The roof vent installation in the picture below is clearly not installed correctly.
The correct installation for roof vent flashing according to industry standards is as follows: The flashing which is usually galvanized steel, but can be tin,aluminum, or copper slides under the shingles on the sides and uphill portion of the vent. On the downhill side, the flashing is exposed, overlapping the roofing shingles.
This picture shows the shingles overlapping the old flashing collar, and then a massive amount of tar to cover the gap between the vent and shingles. You can also see the shingles are not laying flat which will lessen its effectiveness of prevent water intrusion, and high winds. Is this a potential leak area? For sure.
Comments(2)