Then measure the length of your windows to see how many feet of material you ll need to buy. Attach the plastic to the inside or outside of the window frame so that it will block the airflow that leaks around the moveable parts of the window. If you attach the plastic to the outside, use the slats and tacks. If you attach it to the inside, use masking tape. Inside installation is easier, and the plastic won t be exposed to the elements.
Outside installation is more difficult, especially on a multi-story house.
Wherever you install it, be sure the plastic is pulled tightly and securely attached to the frame. Trim the excess plastic around the edges. Besides looking better, this will make the plastic less likely to tear in strong winds. Another common type of storm window has a single pane of glass in a pre-measured aluminum frame. This type is usually fixed in place to the outer frame with a heavy-duty caulking compound or other sealing material.