Identify the material first
Board profile, thickness and texture affect how a repair can fit. A close photo and a whole-wall view help identify questions; existing product records are useful when available.
Look beyond the loose piece
The opening may reveal damaged backing, trim or attachment areas. The proposal identifies the visible repair and explains how concealed findings would be handled.
Set an honest finish boundary
A new board can differ from weathered material even after painting. Discuss whether the work includes one board, a group of boards, trim or the full elevation.
Photos help start the review. Access, concealed conditions and required professional review can change the construction scope.