Window films that block heat and ultraviolet rays can be applied to east-, west-, and south-facing windows to keep the heat in during the winter and out during the summer, and to protect upholstery and fabric against premature fading. The film is usually applied to the inside surface of the outermost windowpane, and it can pay for itself in terms of energy efficiency within a year or so. You can expect most films to last for ten to fifteen years, possibly longer if you choose a film that's professionally installed.
The kits that home centers sell tend to have highly detailed directions, but in general, you need to thoroughly clean the window, cut the film to the window size (or slightly larger, allowing you to trim the film to size once it's on the window), and then wet the window with the kit's special soapy solution. Apply the film as directed (there may be a backing to the film that you have to remove first) to the window, spray the soapy solution over the film, and squeegee out any air bubbles.
How do you remove window film that's damaged or cracking?
Home centers that sell window film also sell a product that removes old window film. Spray the product on the film, and use a plastic putty knife to scrape off the film. Or, try spraying on a solution of water and liquid dish detergent.
These films are much easier to install if you have a helper, especially if you're dealing with large windows. Working alone can be a recipe for creased or wrinkled film, and once the film is creased, it's always creased.
At this point, you've fixed all manner of problems throughout-and around-your house, including doors and windows. Except for a few quick fixes in Chapter 3, however, the house's operating systems, including the plumbing and waste system, have yet to be tackled. In Chapter 18, then, you'll learn all about plumbing fixes.