How Humidity And Heat Can Damage Your Asphalt Shingle Roof

September 29, 2023

Extreme weather conditions can take a toll on your residential or commercial roofing. In particular, high heat and humidity levels can cause significant damage to your asphalt shingle roof. Understanding these potential dangers and taking preventive measures can help prolong your roof's life, ensuring it protects your home or business effectively.


The Disastrous Impact of Heat on Your Asphalt Shingle Roof


Heat can be a formidable enemy for your asphalt shingle roof. The scorching summer sun can cause temperatures on your roof to skyrocket, often reaching up to 150°F. The detrimental effects of such high heat on your roofing system are manifold


The Unseen Consequences of High Heat


Heat causes expansion. When your roof is subjected to high temperatures, the roofing materials, including the wooden components like the joists, support beams, and the decking, tend to expand. This expansion and subsequent contraction as the roof cools can lead to cracks and gaps. These tiny openings become the perfect gateway for moisture and water infiltrating your home.


The Damaging Effect of Ultraviolet (UV) Rays


While the scorching heat is damaging, the UV rays accompanying it can cause further harm. UV radiation can lead to the deterioration of roofing materials, diminishing their protective properties over time. This degradation can leave your roof vulnerable to leaks and other issues.


The Heat from Within: A Hidden Threat


It's not just the external heat that poses a risk to your asphalt shingle roof. The heat from your home can rise to the attic, creating a hot and humid environment. If your attic lacks proper ventilation, this trapped heat can cause the asphalt shingles to blister and crack. This damage could necessitate a full roof replacement if not addressed promptly.


The Hidden Enemy: Humidity


Humidity might seem harmless, but it can be equally damaging to your roof. High humidity levels can damage moisture, even when it's not raining. Let's delve into how humidity can wreak havoc on your roof.


Moisture: The Silent Destroyer


Humidity reflects the amount of moisture in the air. When this moisture combines with excessive heat, it can compromise your shingles and other wooden roofing components. Furthermore, this moisture can penetrate the exterior roofing materials and become trapped in your attic or crawl space. This trapped moisture can lead to the growth of mold and mildew, which not only weakens the plywood but also poses a health risk


The Destructive Power of Mold


Mold thrives in damp and humid environments. Consequently, excessive moisture trapped in your roof can lead to wood rot, which deteriorates the timber structure of your roof. Depending on the extent of the damage, roof rafters showing signs of decay caused by mold growth may need to be repaired or replaced.


Visible Signs of Heat and Humidity Damage


While heat and humidity can silently damage your roof, they leave some visible signs. Here are some common indicators that your asphalt shingle roof has suffered from heat and humidity damage:


  • Discoloration or Fading: UV rays can cause shingles to fade over time. Discoloration is often the first noticeable sign of shingle damage.
  • Curling: Fluctuating temperatures can cause shingles to expand and shrink, leading to curling. Curling is also an indication of aging shingles.
  • Cracking: High heat can make asphalt shingles brittle, developing cracks near the edges or along the center of a shingle.
  • Blisters: Trapped moisture beneath shingles can rise to the surface due to sun exposure, causing heat blisters. These blisters can rupture, leading to vulnerable spots on your roof.

Keep Your Roof Safe from Heat and

Humidity


While you cannot change the weather, you can take steps to protect your roof from heat and humidity. Here are some strategies to help reduce the risk of heat and humidity damage:


  • Proper Ventilation: A well-ventilated attic can regulate the temperature in the attic and the roof, preventing heat and moisture buildup.
shingle roof
  • Regular Maintenance: Cleaning and replacing damaged shingles can ensure your roofing system operates correctly.
  • Professional Inspection: Have your roof inspected by a professional at least twice a year for potential damage.
  • Invest in Cool Roofs: Installing a highly reflective or "cool" roof can prevent early damage from the sun and may even reduce cooling costs.


American Roofing & Restoration provides top-quality residential and commercial roofing services in Warner Robins, GA. Contact us today if you're concerned about the potential damage caused by heat and humidity to your asphalt shingle roof. Our team of experts can thoroughly inspect your roof and provide the necessary solutions. We ensure your roof is protected from the damaging effects of heat and humidity, giving you peace of mind.

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