What is needed is a wide roll of large-bubble bubblewrap, preferably clear but light green is acceptable, a straight edge, a cutting implement and a cutting board.
A tape measure and wide plastic basin will also help.
Measure the precise size of the glass pane in a window. Cut the bubblewrap to size, thoroughly immerse it in water in the basin and then whilst dripping offer it up to the previously mentioned pane flat side to the window. Smooth out so that all areas of the bubblewrap are in contact with the glass, and leave it to dry. Simple. Repeat until all windows are covered.
It will stick for the duration of winter without any glue or adhesive. Making cleaning up at the end of winter easy - just wipe the windows down.
Not only do the air bubbles act as a good insulator, keeping the cold out, but it also provides some degree of sound proofing for those in noisy areas. Shown above my kitchen and lounge windows so adorned. All up I've done six quite large windows.
![Thumbs up! :-bd](./images/smilies/113.gif)
Alison
PS It goes on the inside of the window. Outside it will blow away. After a while if it appears to be peeling off just dampen with a sponge and restick.