My son's daycare center has a garage they use to store toys. The exterior sheathing was touching earth and had invited bugs and water damage. Some of the studs were rotting. I took a saturday and did a band-aid fix. I cut away the bottom few feet of the siding, bulked up some of the studs, and put a skirt of plywood and pressure treated lumber on. This should keep out animals, be resistant to water and bugs, and generally give the garage another 15 years of life or so. Nice weather, and a good excuse to use my favorite macho nailgun!