Skip to Main Content


rocks and boot

Is It a Good Idea to Ventilate the Basement?

Basement ventilation remains a contentious issue for many homeowners and can be a source of pain and problems.

Schedule Free Inspection

One of the vital but most overlooked aspects of the basement is ventilation. Homeowners think basement windows will help them create dry, comfortable, and fresh interiors. But the truth is that windows and mechanical ventilation can do more harm to your basement than good. 

The basement has limited airflow, so it can get musty, moldy, and extremely humid in no time. Basement humidity can cause extensive damage. Read on to learn more about ventilation and what options you have to air out this space.

bad basement ventilation

Is Natural Basement Ventilation Really Necessary?

We won’t advise you to use natural ventilation as it opens your basement and home to moisture. Remember, this is an area that’s also susceptible to mold, mildew, and pests. If there’s an air leak or unabated airflow, things can take a turn for the worse. Talk to your basement contractor to find out the best way to seal up and condition the basement. 

How Does Basement Ventilation Affect You?  

Venting the basement of your Denver, CO, home can hurt you in more ways than you can imagine. Here’s what may happen if you go ahead and ventilate the basement. 

Moisture Buildup

The first thing that’ll happen is that humid air from the outside will flow into your home unabated. The situation could be much worse in summer when the weather is hot and humid. Indoor humidity can easily cross the 50% mark. Beyond this point, mold will start growing and condensation will become commonplace. Creepy crawlies escaping the oppressive heat will turn your basement into their sanctuary.

Structural Damage 

Left unchecked, excess moisture due to basement ventilation or air leaks can also instigate wood rot. Wooden fixtures, ceilings, and doors will start decaying, and this can lead to costly and disruptive repairs.

Awful Smells

Outside air won’t just bring with it moisture, but allergens, dander, dust mites, and toxic particles. These will permeate the basement air and waft into your home. The air, which was once fresh, might feel stale and unpleasant. Before you know it, everyone is complaining of how awful the basement smells. The nasty odors will linger until you seal the basement.

Cures for Poor Basement Ventilation

Lucky for you, there are various ways you can improve ventilation in your basement. 

Seal Drafty Basement Windows

If outside air is getting into the basement via tiny spaces or openings around your basement windows, you’ll want to make sure they’re sealed. Proper sealing prevents air leaks that can lead to high humidity and mold growth. Use silicone latex-based caulk as it’s formulated to withstand the inclement weather. A variety of colors is available to match your window casing. Once the windows are sealed up, you shouldn’t have many issues with temperature fluctuation and humidity indoors.

Dehumidify the Basement

Get an energy-efficient basement dehumidifier and install it in your basement. This appliance will help clear the air of moisture. Humidity levels will drop, and your interior will feel less clammy.

Our basement dehumidifier does more than suck moisture from the air. It cleans and filters the air in the basement all the while preventing foul smells. The dehumidifier also comes with a humidity sensor that monitors the moisture level in the air. Once it’s installed, you just have to sit back and let it do its job. What’s more, it’s self-draining so that you don’t have to worry about emptying any buckets or reservoirs. There’s also the option to route it to the interior drainage system, sump pump, or a condensate pump.

Transform Your Basement

Ventilation will turn your basement into a hotbed for moisture, mold, and foul smells—things that can make your basement feel like a dungeon. You can avoid these and other unpleasant situations by sealing the basement, drying its air, and conditioning it.

Be sure to contact Complete Basement Systems if you’re unsure of how best to seal up the basement. We have been helping homeowners like you create dry, comfortable, and mold-free basements for years. We can help you prevent moisture buildup and damage. Schedule a free basement inspection and repair quote to get started.

Serving Greater Denver area, Colorado Springs, Eastern Colorado, and parts of Nebraska and Wyoming

Colorado Springs, CO

707 County Line Rd.
Palmer Lake, CO 80133

Denver, CO

4686 Ivy St
Denver, CO 80216