Humidity versus Relative Humidity: Why You Need to Know the Difference

Contact us for a free inspection to make sure the relative humidity in your home is at a safe level.


If you have looked over our website, you may have come across the term relative humidity. But, do you really know what it means and how its different from regular humidity?

The picture shows a humidity monitor being used in a crawlspace.

Humidity itself refers to the actual measure of water vapor that is present in the air; making it more likely for precipitation to occur. While, relative humidity does refer to the measure of water vapor that is in the air, but in relation to how much it can hold at that temperature. This is shown as a percentage like in the picture below. When the air in your crawlspace holds more water vapor than it can handle, water droplets form onto pipes, ducts, and the structural wood. This occurrence is known as condensation, which can lead to mold growth, wood rot, and unwelcome pests. 

Since warm air rises, the humid air rises through the home and leaves through the upper levels, and the air is sucked out of the crawl space. This is known as the stack effect. This humid air can make the home much harder to heat and or cool down, which can lead to allergy issues for you and your family in addition to mold issues in the crawlspace.

The humidity experts at Dry Pro can make sure that the relative humidity in your home is at a safe level. Contact us for a free, no-obligation inspection today. Dry Pro services the Troutman, NC, area and its surrounding cities.

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