A Simple Trick Using Salt to Prevent Mold in Your Home: Does It Really Work?

As winter sets in in the United States, homeowners are often faced with the challenge of managing indoor humidity and preventing mold growth.

One proposal comes from the UK, placing bowls of salt near windows to absorb moistureis gaining momentum on the Internet. But does this method really work? Let’s dive into the science and practicality of this approach.

How condensation forms

Condensate occurs when warm, moist air encounters a cooler surface, such as a window. This process causes water droplets to form on the glass, creating an environment conducive to mold growth.

According to the National Oceanic and Atmospheric Administration (NOAA), condensation is affected by the temperature difference between the air and the dew point, not just the specific temperature.

Exposure to mold can pose a significant health riskespecially with prolonged or extensive exposure.

How can salt help?

Salt can attract and hold moisture from the air. If placed in a bowl near a window, salt can absorb some of the moisturepotentially reducing the amount of condensation that forms on glass surfaces. The effectiveness of this method may vary depending on specific areas of the home. For example, bathrooms and kitchens tend to have higher humidity levels, so salt may be more beneficial.

Although salt can absorb moisture, its effectiveness in preventing condensation and mold growth is limited. Salt begins to absorb moisture significantly only at relatively high humidity levels. (about 74% relative humidity at 20°C or 68°F). Many US homes maintain humidity levels between 30% and 50%, which may not be enough for salt to have a significant impact.

For optimal results in maintaining a dry and healthy home environment during the winter months, focus on improving ventilation, using dehumidifiers and ensuring regular maintenance. throughout your home.