The specified application must follow the selected system's requirements. A broad promise to apply a heavy coat does not explain how the completed work will be checked. Product consumption alone may not describe coverage at every detail.
What to do next
Ask what application and verification records the contractor will provide. Include transitions, penetrations, and repaired areas in the discussion. Keep the manufacturer's specification with the project documents so completion can be assessed against a defined system.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.