What you’re describing is a simple, low-tech method to reduce window condensation.
Here’s how it works and why it’s used:
How It Works
- Condensation forms on windows when warm, humid indoor air meets a cold window surface.
- A rolled-up towel on the windowsill absorbs the moisture before it drips onto the floor or sill.
- This prevents water damage, mold, or wood rot in older windows.
Tips for Best Results
- Use absorbent towels (cotton works best).
- Replace or dry the towel daily — once it’s saturated, it won’t absorb more.
- Combine with ventilation: Open a window slightly or use a dehumidifier to reduce humidity.
- Insulate windows: Using thermal curtains or plastic window film can reduce condensation forming in the first place.
Bottom Line
A towel on the sill is a quick, cheap solution, but addressing the root cause — humidity and temperature differences — is the most effective long-term fix.
If you want, I can give a step-by-step guide to fully prevent window condensation without constantly swapping towels. Do you want me to do that?
