Woodrats can be permanently excluded from buildings, and this is the most effective method of control. Woodrats are climbers so you must also exclude them from attic or roof level. Pieces of tin, hardware cloth or chicken wire can be used to seal up any opening along foundations, walls, chimneys, eaves, or roofs. It is important to seal up any openings where pipes, wires, etc. enter buildings. It becomes more difficult to exclude woodrats in vehicles and equipment or even some outbuildings. However, removing the nesting materials and periodically moving the equipment will discourage or deter them, and trapping can eliminate them.