How Heat and Humidity Affect Your Roof

Constant exposure to the sun will increase your roof’s temperature, leading to a hotter home interior and a harder working air conditioning system. Add moisture to the heat and your roof’s longevity can be severely affected. Increased humidity can also make it more difficult to cool the air inside your home.

Heat Damage

Intense heat can cause wood roof rafters, support beams, joists, and decking to expand, stretch, break, and crack allowing water to seep into your home, possibly leading to mold and mildew problems. Heat from the sun’s rays and heat rising into your home’s attic or crawlspace from below can cause shingle nails to pop, shingles to curl and shrink, and weak spots to form.

Humidity Damage

Moisture can also damage your home’s roof and the wood materials used in the structure of your home’s rooftop. Moisture can become trapped in your attic or crawl space, accumulate as condensation, and then lead to mold forming on attic floor joists, roof rafters, and roof joists. Moisture can also lead to wood rot and weaken plywood roof sheathing, causing the layers of the plywood to separate.

Prevention and Protection

There are a few steps you can take to protect your home’s roof against heat and humidity.

  • Roofing Ventilation: Proper venting can minimize the effects of heat and humidity on your home’s roof. Without proper air circulation and roof venting, mold can begin to grow on interior surfaces and condensation can drip from your roof to your ceilings, causing water damage. Your roofing contractor will take into account your home’s design, the local climate, and various other factors before recommending the type of roofing ventilation system that will work best for your home.
  • Timely Repairs: You should never postpone a roof repair. Ignored or delayed repairs will likely result in costlier repairs and could lead to complete roof replacement. We offer several specials and financing offers to work with your budget.
  • Dehumidifiers: Running a dehumidifier in your attic or crawl space can prevent mold growth from condensation. Also, reducing moisture will reduce the air’s heat capacity.

Partner with Reset for All Your Roofing Needs

If you are concerned with heat and humidity damage to your home’s roof, you want to partner with the best. At Reset Roofing, we constantly strive to exceed our customers’ expectations and only employ the highest quality craftsmen in the Metro Atlanta market. Contact us to inspect your home’s roof or to schedule a regular routine roof inspection today—together we can protect your home!


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