Observe from the ground
Note new fragments, visible changes and any associated interior moisture. Keep away from areas below loose masonry and do not climb to check the top of the chimney.
Assess connected issues
Ask whether the inspection will address both damaged masonry and possible moisture-entry conditions. A patch to the visible surface may be incomplete if another component requires attention.
Plan the work
Discuss access, weather-related scheduling and whether temporary precautions are needed before a permanent repair. Have the contractor explain what can be assessed now and what may require a return visit.
Before approval
Request a defined repair area, materials approach and how the condition will be documented before and after the work.