How Does Humidity and Dew Point Affect Your Roof?

Extreme weather conditions can take a toll on your roofing system, but there are ways to mitigate the potential damage they can cause. Before summer hits, it’s vital to perform routine maintenance on your roof to make sure it keeps your home safe and comfortable.

To ensure you take the right steps, It pays to know how humidity and dew point affects your roof. McGuire Roofing and Construction, one of the top roofing contractors in the area, explains more:


Humidity is water vapor present in the air. The warmer the air, the more water vapor it can carry. High humidity levels can cause moisture issues on your roof, which can impair the system in the long run. This is a common problem during summer when the HVAC system is used beyond normal conditions. Condensation will more likely form on the roof, causing leaks, mold growth and other problems.

During your residential roof construction, your contractor will assess your home and ensure proper ventilation in your attic. This prevents heat from getting trapped inside your home that may result in costly problems.

Dew Point

Dew point refers to the specific temperature at a given humidity at which condensation forms. In simpler terms, it measures the amount of water vapor in the air. The higher the dew point, the more likely condensation will form on your roof.

Solutions to Humidity and Dew Point

To prevent issues caused by humidity and dew point, your indoor air shouldn’t move up your roof where it can condense. Make sure you overlap foam insulation and check your vents and other areas by cutting holes through the insulation. They must be sealed properly to avoid air from quickly moving up through your roof.

Make sure your roof performs at its best throughout the seasons. McGuire Roofing is one of the leading residential and commercial roofing contractors in the area. Contact us today at (865) 338-7663 or fill out our form to learn more about our products and services. You may also request a free estimate. We serve Oak Ridge, Knoxville, and nearby communities in TN.

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