How to Choose Replacement Windows

The three main reasons for replacing the windows in your home are to: Replacement Windows

1. Increase natural sunlight;
2. Reduce drafts and unwanted air loss;
3. Lower your electric bill.

Energy Performance Ratings - There are several energy-performance factors that a homeowner should consider when purchasing replacement windows and doors.

Air Infiltration: The less air leakage, the better. Look for replacement windows with an air leakage rating less .30.

Heat Loss: Heat loss is measured in U-Factors. The lower the U-Factor, the more energy-efficient the window. (U-Factor is measured on a scale from 0.20 to 1.20.)

Solar Heat Gain Coefficient (SHGC): SHGC is measured on a scale from 0 to 1. The lower the SHGC, the more shading; therefore, if you live in a warm climate, you’ll want your windows to have a low SHGC. The higher the SHGC, the more solar heat gain. If you live in a cold climate, go for a higher SHGC.

Visible Transmittance (VT): VT is measured on a scale from 0 to 1. The higher the VT, the more natural light the window lets in.

Condensation Resistance: The higher the rating (measured from 1 to 100), the better the window is able to resist condensation.

Types of Replacement Windows

A homeowner should also be familiar with the various types of replacement windows, each having pros and cons.

Wood replacement windows provide natural insulation and are aesthetically pleasing; however, they require routine maintenance and protection against weather. Failing to maintain wooden windows could result in rotting, splitting, or peeling.

Aluminum replacement windows are lightweight, durable, and require little maintenance. In humid climates, however, aluminum windows often fall victim to condensation. They are also not very energy-efficient.

Vinyl replacement windows are durable, inexpensive, and virtually maintenance-free; however, they can warp if subjected to extremely hot or cold climates.

Steel replacement windows are weather resistant and last longer than any other type of window; however, they will rust if improperly maintained and are a poor thermal insulator.

Fiberglass replacement windows are relatively new to the market. They are extremely durable, good insulators, and very rarely show any signs of age. If you can afford them (they’re twice the price of vinyl windows), fiberglass windows may be your best bet.