In our cold and dry Minnesota winters, it’s common for interior windows to develop condensation. When the temperature of window glass is at or below the dew point of the air inside a home, condensation will occur. If the temperature of the glass is below freezing, frost can form.
Condensation isn’t just a nuisance. It can cause major damage to window and wood trim finishes, and negatively impact a home’s insulation. Family Handyman offered two tips for preventing window condensation, which we’ll summarize here:

Lower Indoor Humidity
It’s important to maintain a certain level of humidity in your home during the cold and dry winter months. However, if the humidity gets too high, it could cause condensation to form on windows and potentially inside your walls. Common sources of indoor humidity include showers and baths, cooking, and of course humidifiers. To lower indoor humidity:
- Run the bath fan when showering, and a kitchen exhaust fan when cooking. (If you need to add or replace fans, our rental tools and equipment will make it easy!)
- Make sure your clothes dryer exhaust vent is venting outside
- Lower the settings on your humidifier
Add Window Insulation
Adding a storm window or an additional layer of glazing will help to prevent condensation. With each layer, the interior temperature of the glass is raised, and indoor air can be more humid without the windows getting frosty.
If you can’t add additional glass to your windows, check out our blog post with three inexpensive fixes for drafty windows.
Need to better insulate your windows or your home? We have all the rental equipment and tools you need to get the job done. Visit our online tool rental catalog to get started.
From trailers to scaffolding, trimmers and mowers, saws, skid steers and more, Broadway Rental has the affordable rental tools and equipment you need for your next lawn and garden or remodeling project. Check out our full Minneapolis rental equipment catalog to find the right tools, and get in touch to get started today.