Condensation occurs when warm, humid air comes into contact with a cold surface, such as window glass. This results in water droplets forming on the glass, much like how a cold beverage develops sweat on a hot day.

Several factors contribute to window condensation, including:

• • High Indoor Humidity – Everyday activities like cooking, showering, and even breathing increase indoor humidity levels.

• • Poor Ventilation – Lack of airflow can trap moisture inside the home, exacerbating condensation issues.

• • Cold Outdoor Temperatures – In colder months, the temperature difference between the indoor and outdoor environment increases the likelihood of condensation.

• • Inefficient Windows – Older, single-pane, or poorly insulated windows are more prone to condensation due to inadequate thermal resistance.

• • Tightly Sealed Air-Conditioned Homes – In hot and humid climates like Houston, Texas, a well-sealed and air-conditioned home can create condensation on the exterior of windows, especially near plants and shrubs. When the cool indoor air keeps the window surface cold while warm, moisture-laden outdoor air comes into contact with it, condensation forms on the outside of the glass. This is a sign of energy efficiency, but excessive moisture buildup can lead to streaking and water damage over time.