High-quality windows have a lifespan of about 20 years. Builder grade windows generally begin to shows signs of deterioration before that point. Windows give signs that they are nearing the end of life and that it might be time to get replacement windows.
Replacement windows will generally be more energy efficient, give a much more updated, clean appearance. They come in wood, vinyl, and fiberglass encasements. There are multiple styles of windows that include double hung, casement, sliders, awning, and hopper style. Each has a different hinge opening and advantages.
If your windows have begun to warp or fog, you want to update your look, you want to save money on energy bills, or your windows are older than 20 years, it's time to look at replacement windows. The Homeowners Resource Guide's Endorsed Vendor listing helps you find the best companies for your needs.