Replacement Windows

In addition to providing air and light, windows are an important element of a building. They bring color and interest into rooms and make them feel larger. Windows do wear out, however. Window light should lessen the amount of electricity needed for lighting. But as they age and become ineffective, windows can cause utility bills to rise significantly because of heat loss in the winter or too much light and heat coming in during the summer months.

When Should a Window Be Replaced?

Aside from having a broken window or wanting a new décor, there are several signs that a window needs to be replaced. The first and most obvious is their unsightly appearance. Another sign is a draft coming into the room even when the window is closed. Another clear sign is a build-up of condensation or frost.

Types of Windows

Today's options for windows go far beyond yesterday's single-pane windows. Modern windows are far more energy-efficient. Thus, replacement windows are an investment in increasing the value of the building. Thermal windows have double or triple panes, thus inhibiting the flow of heat into or out of the room and lowering utility bills.

In addition, there are three tints or coatings for window glass, which help to significantly reduce heat conduction. These include:

• Heat-absorbing glass
• Reflective glass
• Low-E glass.

These special glass coatings either reflect or absorb nearly 50 percent of the heat that would pass through clear glass.

Tips for Replacement Windows

In addition to the options for glass, you'll want to keep several things in mind when you shop for replacement windows.

• Although there are many new attractive window styles today, you'll need to look for replacement windows that open the same way as the windows being replaced. (This is not necessary, of course, if your current windows are fixed so they won't open.)


• The energy efficiency of a window is represented by a U-factor or an R-factor on the label or other product information. A window with a high R-value will lose less heat. U-factors are indicated as AA (window for a residence) or BB (window for a commercial structure).


• Remember that windows are a long-term investment in the building. Be sure the warranty is appropriate for your investment.


• If lower energy bills is one of your objectives in window replacement, be sure to get a professional for the installation. Your potential energy savings will be significantly eroded if a thermal window is not installed in exact vertical alignment.

By Kathleen Goolsby