Diagnosing Poor Roof Ventilation

What happens here

Luke examines a round metal roof vent, which was poorly integrated into the roof with surrounding caulk. He explains that this type of vent, combined with improper sealing (just caulk over multiple shingle layers), creates pathways for water penetration. Water can enter through keyways or vent holes, channel under the shingles, and eventually penetrate the attic, leading to humidity issues and potential damage. Luke recommends replacing these problematic vents with a proper ridge vent system, which allows heat to escape the attic while preventing water intrusion. This involves removing the old vent, patching the opening with wood, and installing a continuous ridge vent along the peak of the roof.

Goal: Identify and understand the issues caused by inadequate roof ventilation and improper vent installation.