A manufacturer’s warranty covers the window itself and protects against product defects (different products will have different warranties). Conversely, an installation warranty covers the workmanship of the installation (typically for five years). Some firms offer a lifetime installation warranty that’s good as long as you own your home, in which case you’re covered for both the product and workmanship. An installation warranty is critical, because no matter how high-quality the window is, it won’t work properly if it’s not installed correctly.
It’s also important to consider the method of installation. There are two methods to choose from: full-frame replacement and retrofit. There’s no simple answer as to which is right for your home, because each has its own benefits for particular situations. “You should really sit down with a contractor and ask them to explain the various methods,” says Jeffrey Pickard, owner of Five Star Windows in Campbell. “Not only will you be able to make a better decision about the method that’s right for you, but asking gives you an opportunity to evaluate the contractor. If they can clearly explain all your options, the company is likely to have the expertise and work ethic to do the job right.”
When it comes to choosing a window, be sure to look at the energy ratings of the options you’re considering. Mr. Pickard warns that many manufacturers surround their products with marketing hype and industry fluff. For instance, manufacturers will often advertise that they use argon gas in between the panes of a window, but that doesn’t make much of a long-term difference. “A window’s energy advantage mostly comes from having double panes, not from the type of gas that’s in between the panes,” says Mr. Pickard. “Having a second pane increases energy efficiency by almost 300 percent, while using argon gas only adds 5 percent.”
