In the winter, windows are a significant avenue for heat loss. It is a common practice to attach plastic film over window openings to create a double-pane effect. Heat-shrink plastic can be purchased in kits that contain double-sided tape for attaching the clear plastic film, preserving a clear view while cutting heat loss. DIY solutions often use common package-sealing tape, duct tape, staples or even wooden battens and nails.
These methods have a tendency to leave stains, adhesive residues or physical damage on walls surrounding windows, making them undesirable for people who rent their dwellings, or who wish to minimize such damage to their own property. Alternative solutions have used wooden or metal frames to insert into window openings, but these can be costly or time consuming to construct.
In this instructable, a method is described for quickly and non-destructively hanging 1 mil plastic sheeting to the inside of a recessed window opening, creating a good, if imperfect, second pane for winter insulation. It works by holding the plastic in place with spring-tension curtain rods or bamboo rods.
Step 1: Using 6-foot long bamboo
I bought this bamboo from a local home center / hardware store. It is inexpensive and flexible. For a small window, they work quite well. In the summer, use them as cheap fishing rods.