**Reno's Roofs: Cheap Shingles Fueling Lung Mold?**
By Franklin Everett ShawThe air in Reno is different. It’s dry, crisp, and carries the scent of sagebrush and distant mountains. But lately, some residents are noticing a different, less welcome scent: a musty, earthy odor that clings to the air, especially after a rare desert rain. Could the roofs over their heads be the source?
The rapid expansion of Reno, fueled by an influx of tech companies and a relatively affordable cost of living (compared to California, at least), has led to a construction boom. Many new homes are being built quickly and, understandably, on a budget. This often means using asphalt shingles, the most common and cheapest roofing material. But are these budget shingles, designed for wetter climates, contributing to a hidden health hazard in Reno’s unique environment: lung mold?
Asphalt shingles are composed of a fiberglass mat saturated with asphalt and then coated with mineral granules. The granules protect the asphalt from UV degradation, but the asphalt itself can be a food source for certain types of mold, especially when combined with moisture and organic debris. While Reno is known for its dry climate, it does experience seasonal rainfall and snowfall. Furthermore, the north-facing slopes of roofs, shaded from the intense desert sun, can retain moisture for longer periods.
The key issue lies in the type of asphalt used in budget shingles. Cheaper shingles often utilize asphalt with a higher organic content. This organic material, while making the shingle more pliable and easier to install, also provides a more readily available food source for mold spores. Think of it like comparing a gourmet steak to a fast-food burger – both are meat, but one is far more appealing to a discerning palate (or, in this case, a hungry mold colony).
The specific mold species that thrive on asphalt shingles vary, but some common culprits include Alternaria, Aspergillus, and Cladosporium. These molds release spores into the air, which can be inhaled and, in susceptible individuals, trigger allergic reactions, asthma attacks, and even more serious respiratory infections like hypersensitivity pneumonitis (also known as “lung mold”).
Reno’s dry climate presents a unique twist. While mold needs moisture to grow, it doesn’t need constant moisture. Intermittent periods of dampness, followed by drying, can actually encourage certain mold species to sporulate (release spores) as a survival mechanism. This means that even short periods of rain or snow can lead to significant mold growth on susceptible shingles, followed by a burst of spore release when the roof dries out.
So, how can Reno homeowners determine if their budget asphalt shingles are contributing to a potential mold problem? Here’s a step-by-step guide:
Visual Inspection: Carefully examine your roof for signs of discoloration, staining, or visible mold growth. Pay particular attention to north-facing slopes and areas under trees where moisture may linger. Look for dark streaks or patches, often black or green in color. Do not attempt to climb onto your roof without proper safety equipment and precautions. If you are uncomfortable or unable to inspect your roof safely, hire a qualified roofing contractor.
Shingle Composition: If possible, determine the brand and type of shingles used on your roof. Contact the builder or previous homeowner for this information. Research the shingle’s specifications online, paying attention to the type of asphalt used and its resistance to mold growth. Cheaper shingles are more likely to use asphalt with higher organic content.
Indoor Air Quality: If you suspect mold growth on your roof, consider testing your indoor air quality. Several DIY mold test kits are available at hardware stores, but for a more accurate assessment, hire a professional mold inspector. They can collect air samples and identify the specific types of mold present in your home.
Health Symptoms: Be aware of any respiratory symptoms that may be related to mold exposure, such as coughing, wheezing, shortness of breath, nasal congestion, and eye irritation. If you experience these symptoms, consult with your doctor.
Professional Assessment: If you find evidence of mold growth or suspect a problem, contact a qualified roofing contractor or mold remediation specialist. They can assess the extent of the problem and recommend appropriate solutions.
Mitigating mold exposure from asphalt shingles in Reno requires a multi-pronged approach:
Roof Cleaning: Regularly clean your roof to remove organic debris, such as leaves, pine needles, and bird droppings, which can provide a food source for mold. Use a soft brush and a mild detergent solution. Avoid using high-pressure washers, as they can damage the shingles.
Algae-Resistant Shingles: When replacing your roof, consider using algae-resistant shingles. These shingles are treated with copper granules, which inhibit mold and algae growth. While they may be slightly more expensive than standard shingles, they can save you money in the long run by reducing the need for frequent cleaning and preventing premature roof deterioration.
Ventilation: Ensure that your attic is properly ventilated. Adequate ventilation helps to reduce moisture buildup, which can create a favorable environment for mold growth. Check your attic vents regularly to ensure they are not blocked by insulation or debris.
Professional Mold Remediation: If you have significant mold growth on your roof, it’s best to hire a professional mold remediation specialist. They have the expertise and equipment to safely remove the mold and prevent it from returning.
Consider Alternative Roofing Materials: While asphalt shingles are the most common and affordable option, they are not the only choice. Consider alternative roofing materials, such as metal roofing or tile roofing, which are more resistant to mold growth and can last longer than asphalt shingles.
One common mistake Reno homeowners make is assuming that because the climate is dry, mold is not a concern. This is simply not true. Even in a dry climate, intermittent moisture can be enough to support mold growth, especially on susceptible materials like budget asphalt shingles.
Another pitfall is attempting to clean the roof themselves without proper safety equipment or knowledge. This can be dangerous and can also damage the shingles, making the problem worse. Always hire a qualified professional for roof cleaning or mold remediation.
Finally, many homeowners fail to address the underlying cause of the mold growth, such as poor ventilation or excessive debris accumulation. Simply cleaning the roof without addressing these issues will only provide a temporary solution.
The recent surge in Reno home construction using budget asphalt shingles may indeed be contributing to a rise in local lung mold cases. While more research is needed to establish a definitive link, the potential for these shingles to foster mold growth in Reno’s unique climate is undeniable. By taking proactive steps to identify at-risk shingles and mitigate mold exposure, Reno homeowners can protect their health and the value of their homes. Don’t let a budget roof become an expensive health problem.