Conquering High Humidity in Basements

August 2023

Basements serve as valuable extensions to our living spaces as well as provide recreational areas and additional storage. However, they also happen to be notorious for their tendency to harbor high humidity levels. This unwelcome moisture can lead to a host of issues, including musty odors, mold growth, and even structural damage. Let’s explore the causes of high humidity in basements and review effective strategies to combat this pervasive problem.

Before we delve into the solutions, it’s essential to understand the factors that contribute to high humidity in basements:

• Groundwater Seepage: Moisture can seep into basements through cracks in the foundation or porous concrete walls, resulting in a damp environment.
• Inadequate Conditioning: Often, basements are not serviced by the home’s heating and air conditioning system (HVAC), therefore moisture is trapped in this space.
• Improper Drainage: Poorly designed or malfunctioning drainage systems as well as some soil types can lead to water accumulation around the foundation, increasing basement humidity levels.
• Climatic Conditions: The high humidity levels and frequent rainfall of the northeast can exacerbate the moisture problem in basements.

How do we solve it? Now that we understand the causes, let’s explore effective strategies to combat high humidity and moisture in basements:

• Identify and Fix Water Intrusion Points: Thoroughly inspect the basement for cracks, gaps, or leaks in the foundation, walls, or windows. Seal any openings using epoxy or specialized sealants to prevent water seepage.
• Improve Basement Air Movement: Install fans to enhance air circulation.
• Install a Dehumidifier: A dehumidifier is a powerful tool to control humidity levels in basements. Choose a unit with sufficient capacity for the size of your basement. Self-pumping dehumidifiers are recommended because they do not need to be manually emptied and can operate more efficiently.
• Ensure Proper Drainage: Ensure that gutters and downspouts direct rainwater away from the foundation. Consider installing a sump pump or French drain system to manage excess groundwater.
• Insulate Pipes and Cold Surfaces: Condensation can contribute to basement humidity. Insulate cold water pipes and basement walls to prevent moisture buildup.
• Use Moisture-Resistant Materials: When renovating or finishing your basement, opt for materials that are resistant to moisture, such as mold-resistant drywall and waterproof paint. These can help mitigate future moisture-related issues.
• Monitor and Control Relative Humidity: Invest in a hygrometer to monitor humidity levels in your basement. Aim for a relative humidity of around 40-50% to prevent mold growth and maintain a comfortable environment.

High humidity in basements is a persistent problem that can lead to a range of issues, from unpleasant odors to potential structural damage. By understanding the causes and implementing effective solutions, you can reclaim your basement as a comfortable and functional space. Once can conquer the humidity beast, you’ll enjoy a healthier and more comfortable basement environment for years to come.

If you’re not sure where to start the process, Tiger offers both inspection and testing services to evaluate your basement moisture and humidity concerns, and we will guide you to the right solutions to fix them.