Decreasing Basement Humidity this Summer

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It’s officially summer, which often brings heavy afternoon showers and higher humidity. Basements are prone to flooding, which is an important consideration during basement finishing in Highland Ranch. Extra water and basement humidity levels lead to mold growth and other issues in your space. Below are a few tips and suggestions for staying on top of humidity this summer!

Measure Humidity Levels and Determine the Cause

Humidity levels are important because mold, mildew, and other types of bacteria thrive in high humid (damp) environments. Healthy humidity levels should be around 30-50 percent. You should be able to physically discern if your basement is damp and humid. A distinguishable characteristic of high humidity levels is condensation on the walls and other surfaces. Hygrometers are helpful tools for measuring humidity levels. And many smart thermostats (like the Nest) also measure humidity levels along with the temperature. 

Many factors lead to high humidity in your basement space, including heat, water build up from the ground outside your basement, and poor circulation.

Decreasing Humidity Levels 

If your basement does not have a good central air conditioning system it may be too hot, contributing to higher humidity levels. If the budget allows, consider updating or even overhauling the current basement air conditioning system to prevent mold and mildew growth. Window AC units or portable AC units are budget-friendly options.

Running a humidifier also reduces the humidity levels in your basement. If you have a large basement, you may need one humidifier in each room or at least a few in different sections to bring the levels down to 50 percent or less. 

Updated insulation protects your basement from the high outside temperatures and dampness. Walk around the exterior of your basement to check for cracks in the walls or windows. Caulk and repair cracks and even update old windows to maintain consistent temperatures and levels in your basement space. 

Prevent Water from Seeping in

Check the gutters and other areas surrounding your basement where water collects. Preventing water buildup keeps the ground dry and also ensures protection against water seepage. 

Consider installing a water alert system, which sounds an alarm or triggers your phone to alert you if your basement is flooding or humidity levels are rising. This is a great way to stay on top of your basement humidity maintenance this summer!

Frequently Asked Questions

What causes high humidity in a basement?

High basement humidity is commonly caused by poor ventilation, water leaks, foundation moisture, condensation, and inadequate drainage around the home. Identifying the source is the first step toward reducing excess moisture.

How can I reduce humidity in my basement?

You can lower basement humidity by using a dehumidifier, improving ventilation, repairing leaks, sealing foundation cracks, maintaining your HVAC system, and ensuring proper drainage around your home’s foundation.

What humidity level should a basement have?

Most experts recommend maintaining a basement humidity level between 30% and 50%. Keeping humidity within this range helps reduce the risk of mold, mildew, and moisture-related damage.

Can high basement humidity lead to mold growth?

Yes. Excess humidity creates the ideal environment for mold and mildew to grow. Controlling moisture levels helps protect your home’s structure, indoor air quality, and stored belongings.

How can I prevent basement humidity from returning?

Regularly inspect for leaks, clean gutters and downspouts, maintain proper grading around your home, use a dehumidifier when needed, and ensure your basement has adequate ventilation to keep moisture under control.