Staining or corrosion near equipment can involve runoff, incompatible materials, trapped debris, or other local conditions. The pattern deserves investigation before assuming the entire roof material has failed.
What to do next
Document the affected locations and nearby equipment. Ask the roof and equipment contractors to review the source together where appropriate. Any repair should address the cause and preserve material compatibility instead of covering the affected area without an explanation.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.