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Identify which passage each image belongs to
Start with the room, appliance or fireplace and the flue it serves. A masonry stack can contain more than one passage. A photograph from the upstairs fireplace cannot document the one below unless the report establishes which path was examined. Ask for a key to any camera labels and the direction of travel.
Read the finding alongside the image
Ask the inspector to identify the material, the approximate position and the feature of concern: for example, a joint, a discontinuity or an obstruction. Ask how that finding changes the recommendation, and whether the explanation relies on the camera, exterior observations or both. Keep the annotated images and written interpretation together if you seek another opinion.
Look for sections the scan could not reach
A report should distinguish observed conditions from a bend, obstruction or inaccessible area that limited coverage. CSIA’s masonry inspection guidance explains the role of internal flue examination and accessible components. Ask what remains unknown and whether additional access is necessary before any decision on continued use. An impressive set of still photos alone does not document continuous coverage.