Why ventilation belongs in the estimate
Ventilation affects attic heat, moisture, and shingle performance. Replacement estimates should account for intake and exhaust rather than only shingle color.
Common ventilation issues
Mixed vent types, blocked intake, insufficient exhaust, and old penetrations can create avoidable problems after a new roof is installed.
Ask before work begins
Ask how ventilation will be evaluated, what ridge or exhaust system is included, and whether intake airflow is adequate for the roof design.