Items you will need
You may need to cover your exterior windows in the event of seasonal disuse, inclement weather such as hurricanes, or when you have an abandoned house.
Measure the height and width of the window you want to cover. Make sure you measure to the outside edges of the window frame.
Cut a window cover out of exterior-grade plywood.
Screw the plywood into the window frame.
Paint the plywood to protect it from the elements, especially if it will be in place for more than six months.
Be careful when operating a saw.