Repairing a section of sheathing.
Before installing new siding, you will need to remove some of the old siding. Before you start, determine which wood pieces will stay and take care not to damage them while removing siding. A flat pry bar and hammer will take care of most of the job, but special tools can help speed up the removal.
Have a plan for disposing of the old siding. Unless the area to be stripped is small, you will probably want to rent a roll-off trash container. Arrange to have it delivered as close to the site as possible and create plank paths for wheelbarrows so you can fill the bin without damaging your yard. Place drop cloths or plastic sheeting on the ground to minimize cleanup later.
Plan to cover the bare sheathing with building wrap on the same day that you remove the old siding.