All roofing systems have an expected lifespan. For instance, asphalt shingles, one of the most popular roofing materials on the market, usually last 20 years. As these shingles near the end of their lifespan, warning signs such as curling near the edges of the shingles might start to appear.
Age is the most common cause of curling shingles, but it’s not the only one. Other possible culprits include:
Poor Roof and Attic Ventilation
Without adequate ventilation, moisture becomes trapped in your attic and roof, creating a damp environment that’s the perfect breeding ground for mold and mildew, causing shingles to curl. As a rule of thumb, there should be a vent in your roof for every 300 square feet of attic area or every 150 square feet of attic area for attics that don’t have a vapor barrier. If you’re not sure if your roof and attic have enough intake and exhaust vents, it’s a good idea to have a contractor from a reputable roofing company conduct an inspection.
To save time and money, some homeowners have new shingles installed on top of their old roofs. However, most contractors wouldn’t recommend this installation method because the new layer of shingles traps heat, potentially causing some of the new shingles to curl and shortening the lifespan of your new roof. Not to mention the new layer of shingles isn’t as secure as the roof underneath it and added weight load from the new roof can damage your home’s structure.
Remember: Installation errors can drastically shorten the lifespan of your roof and increase the risk of damage affecting other parts of your home. To ensure your roof is installed properly, only a certified and licensed roofing contractor should handle its installation.
Looking for certified roofers in your area?
Genesis Roofing, a Haag-certified roofer with over a decade of experience in the industry, offers a wide range of professional roofing services, including roof replacement services. To get a free estimate, call us at (515) 202-1667 or fill out this form. We serve homeowners in Clive, IA, as well as the surrounding communities.