Controlling and Preventing Spring Mold Growth in Your Home
Last updated January 8, 2026
Last updated January 8, 2026

Spring is the season of new growth. The grass is growing again, flowers a jetting out of the ground, and trees are budding. In Minnesota, this also means the last of the snow is melting (or still falling, depending on the day) and ice-covered lakes and rivers are exposed again. All this extra moisture has the opportunity to grow more than just new plants.
Now is the season that homeowners need to be especially wary of mold growth. It comes down to one simple equation: control the moisture in your home, and you’ll control the mold.
Winter collects more than just dust in your home. Start by clearing your home–inside and out–of debris and excess.
Should you find minor mold growth in your home, you can remove it yourself using a bleach solution. Anything that might be extensive should be taken care of by a professional mold removal specialist. For one, inhaling mold is dangerous and unless you are trained to do it properly, you shouldn’t risk your health. Secondly, mold can cause major damage to the structure of your home. When removing mold, you want to be certain you got it all.
During the winter, many people use humidifiers to compensate for the dry air. As the air becomes more humid naturally, you should invest in a dehumidifier for damp areas in your home, such as the basement, entryways, or near drafty windows and doors.
It’s best to maintain a moisture level between 15 to 50 percent. Anything above that will foster mold growth. You might also consider upgrading your HVAC system, as many of the new controls help keep the humidity levels in your home at an optimal range.
If you want to get a true gauge of your home’s performance, consider an Energy Audit from RetroGreen Energy. From air leakage to heat patterns, you can discover how much of your home is truly connected to the outdoors.
Get a free energy audit and discover how much you could save on your utility bills.
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Chris didn't start RetroGreen Energy because he wanted to be in the insulation business. He started it because he wanted to fix homes the right way.
After earning his BPI Building Analyst certification and Minnesota Building Contractor license, Chris spent years studying how homes perform as systems. He saw firsthand that most comfort and energy problems weren't caused by old windows or outdated furnaces — they were caused by air leakage and inadequate insulation that nobody was diagnosing properly.
In 2009, he launched RetroGreen Energy with a commitment to doing things differently. Every project would start with proper diagnostics. Every recommendation would be based on data, not sales targets. And every homeowner would get the honest truth about what their home actually needed.
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