Look for these signs indicating that you need new windows:

1. The curtains move when the wind blows.
2. You feel cold air around your neck when you sit next to a window.
3. Your windows sweat all the time in cold weather.
4. You can see light around the window sashes.
5. You can see light around the window frame.
6. You have bugs on the window sill.
7. You have bugs coming in the windows.
8. You have cracked glass.
9. Your glazing or putty is cracked.
10. Your windows rattle when the wind blows.
11. Your windows rattle when you walk in the house.
12. Your windows rattle when traffic drives by.
13. You can hear traffic easily from outside.
14. You can hear people talking outside.
15. Rain water is coming in the window.
16. Ice forms on your windows.
17. Mold and mildew grow on your windows.

Energy Calculator 

By replacing windows and/or siding, you may reduce your energy usage and cost.  You must maintain similar life styles, occupants and conservation habits to receive the benefits.  (That is, you cannot get new windows and then leave the doors open or hot water running to see savings.)