Said It Here

What is this on my dry verge?

People find unfamiliar objects, growths, and ducts on their dry verge or roof sections without knowing what they are or whether they are safe. This leaves homeowners uncertain about whether the features are harmless things like lichen, necessary exhaust vents, or damaged components that require cleaning or repair.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    searching online
  2. 2
    asking community forums
  3. 3
    Inspecting the vent alignment with indoor appliances
  4. 4
    Asking online communities for identification and guidance

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/HomeMaintenance1 person · October 2026

“Im actually not sure what that is. It is aligned with the dryer duct. How does one clean this thing?”source ↗

Entire_Coach5037 · r/HomeMaintenance · 2 upvotes

“Im pretty sure this is the exhaust vent for our dryer. No there are no vents anywhere around the sides of the house.”source ↗

“Shouldn't this silver duct have a cover like the black vent in front of it?”source ↗

Entire_Coach5037 · r/HomeMaintenance
r/Roofing2 people · October 2026

“What is this on my dry verge?”source ↗

“I looked up and noticed this on the top left corner of my dry verge. Any ideas what it is and if it's okay?”source ↗

Zealousideal_Tea8925 · r/Roofing · 2 upvotes

“If you mean the yellow stuff at the top right, I suspect it’s lichen. Quite harmless, but harder to get rid of than moss.”source ↗

cdtobie · r/Roofing · 1 upvotes

Where this came up

People with this problem also raised