Compare the existing assembly
Material type, age, overlap, trim and current fastening conditions affect the available approach. Manufacturer instructions and applicable requirements guide the selected product details.
Decide how far to go
Scattered damage may justify different options than a single impact area. Review the remaining wall, the cause of damage and the practical finish boundary before choosing repair or replacement.
Coordinate surrounding work
Siding access can touch light fixtures, pipes, sealant joints and paint. Identify these items in the scope, along with responsibility for any specialist or design work.
Photos help start the review. Access, concealed conditions and required professional review can change the construction scope.