A blister or raised area should be evaluated in context rather than automatically punctured or coated. The membrane type, underlying conditions, and extent of the issue influence the appropriate response.
What to do next
Ask the contractor to document the affected locations and explain what investigation is needed. Compare local repairs with broader work using the findings. Avoid authorizing a surface treatment that conceals the condition without addressing its cause.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.