Do window insulation kits actually work? Yes! They seal off drafty windows so you can spend less on your home heating bills.

A sheet of heat-shrink plastic or other insulating material is attached to the window panes with double-sided tape or ...

Basically, window insulation is a barrier that prevents heat ... a spray bottle full of water and some double-sided tape: Measure each window pane and cut bubble wrap to fit, using scissors.