Coastal exposure requires checking the selected material and finish against the manufacturer's actual warranty terms. Distance to water can matter, but so can the type of water and other exposure conditions. A generic coastal label is not a coverage determination.
What to do next
Provide the property location and ask for written product-specific guidance where needed. Read exclusions and maintenance conditions before choosing a system. Keep warranty eligibility separate from a salesperson's estimate of how long the roof may last.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.