Windows should work smoothly and efficiently. They should be easy to open and close and shouldn’t get stuck in any position. It’s also a major safety concern if you’re having trouble securing the lock. Poorly functioning windows are likely to have been incorrectly installed or damaged somehow.

Excessive moisture between window panes and on the window surface is not only unsightly, but it’s the sign of larger issues. Condensation typically indicates seal failure and could lead to moisture damage or mold growth inside your home.

Green growths and black streaking indicate moss, algae, or more alarming organic growths. These are usually an indicator of more significant, hidden moisture and water damage.

Harsh sunlight or frost and thaw cycles can wreak havoc on windows, causing frames to warp, crack, or rot. These are signs your windows have reached the end of their protective lifespan. 

Higher than normal energy bills can be a strong indicator of worn out windows. Unseen gaps or holes, coupled with a lack of protective UV coating in the glass, can lead to energy loss and create an uncomfortable living environment.