What can block ventilation opening covers at the eaves?

Ventilation opening covers at the eaves can become obstructed due to various factors, but the option indicating that they can be blocked, typically by paint, highlights a common issue. When conducting maintenance or painting projects, it's possible for paint to accumulate over time and inadvertently seal off ventilation openings. This blockage can significantly reduce airflow and compromise ventilation effectiveness in the attic or roof space, leading to potential moisture and ventilation problems.

Other factors, such as weather conditions or animal activity, can also block ventilation, but the emphasis on paint relates directly to common maintenance oversights. Understanding these issues helps homeowners and professionals ensure that ventilation systems remain unimpeded, providing adequate airflow and preventing issues like mold growth or structural damage in the building.