Ventilation decisions involve the attic and roof assembly, not simply the number of visible vents. Intake paths, exhaust locations, insulation, and obstructions all affect the design. Adding an isolated vent may not address the underlying issue.
What to do next
Ask what observations support the ventilation recommendation. Have the scope explain any changes to intake and exhaust together. Keep roof leakage, condensation, and indoor comfort concerns distinct until the inspection connects them to specific findings.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.