Seal open sides of modular units to prepare them for shipment, using polyethylene sheets, nails, and hammers. Move and set up mobile homes or prefabricated buildings on owners' lots or at mobile home parks. Inspect, examine, and test the operation of parts or systems to evaluate operating condition and to determine if repairs are needed. Connect water hoses to inlet pipes of plumbing systems, and test operation of plumbing fixtures. Remove damaged exterior panels, repair and replace structural frame members, and seal leaks, using hand tools. List parts needed, estimate costs, and plan work procedures, using parts lists, technical manuals, and diagrams. Confer with customers or read work orders to determine the nature and extent of damage to units. Install, repair, and replace units, fixtures, appliances, and other items and systems in mobile and modular homes, prefabricated buildings, or travel trailers, using hand tools or power tools. Reset hardware, using chisels, mallets, and screwdrivers. Repair leaks in plumbing or gas lines, using caulking compounds and plastic or copper pipe. Locate and repair frayed wiring, broken connections, or incorrect wiring, using ohmmeters, soldering irons, tape, and hand tools. Open and close doors, windows, and drawers to test their operation; and trim edges to fit, using jackplanes or drawknives.