01
Ask for a clear record
Request a wide photograph locating the discovery and closer images showing the condition. The explanation should distinguish hidden deterioration from a change in preference or material availability. Ask how the finding affects the original scope and whether other reasonable approaches exist. Avoid making a decision based only on an unlabeled close-up sent without context.
02
Connect the change to completion
Record the agreed revised work, any sequence changes, and what documentation will be supplied when it is finished. If opening the roof reveals a wider issue, ask whether further assessment is needed before extending the repair. Preserve the approved change beside the original proposal. This gives future owners and repairers one coherent account of what actually happened during the project.