A change order should describe what changed, why the work is needed, and how it affects scope, price, or schedule. A request for additional payment without that context is hard to evaluate.
What to do next
Ask for photographs or other supporting information when concealed conditions are involved. Confirm authorization before additional work where the agreement requires it. Keep the accepted change with the original scope so closeout can be checked against the complete authorized project.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.