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Ryan Hern

Understanding the Health Risks of Mold and Algae Growth on Your Home’s Exterior

When most homeowners think about maintaining their property, attention often focuses on interior issues like plumbing, insulation, or the condition of windows and doors. However, the exterior of your home, especially if it's prone to moisture buildup, can harbor some sneaky health risks, specifically mold and algae growth. Left untreated, these substances can cause more than just cosmetic damage to your home—they can pose significant health risks to you and your family.


How Mold and Algae Develop on Your Home’s Exterior


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Mold and algae thrive in damp, humid environments. When moisture accumulates on surfaces such as siding, decks, and roofs, it creates the perfect breeding ground for these organisms. Homes in areas with high humidity, heavy rainfall, or near bodies of water are particularly vulnerable.

Algae appear as green or black streaks on your home’s exterior, commonly found on siding, roofs, or brickwork. Mold, on the other hand, often appears as dark, patchy spots and can grow on almost any surface that remains moist over time.


Siding - Mildew, Mold & Algae Growth

Patio Area, Pool Decks and Driveways - Mold & Algae Growth - Black Discolouration

Shingles or Cedar Shake - Moss Growth, Mold, & Algage Growth

Health Risks Associated with Mold

Mold, especially black mold, can pose significant health risks. When it grows on the exterior of your home, it can spread through cracks, windows, and doors, entering your living space and contaminating the indoor air. Mold releases tiny spores into the air, which can cause allergic reactions, respiratory problems, and other health issues, particularly in individuals with asthma or weakened immune systems.

Some common health issues related to mold exposure include:

  • Allergic reactions such as sneezing, coughing, or a runny nose.

  • Respiratory problems, including shortness of breath, wheezing, or exacerbated asthma symptoms.

  • Skin irritation or rashes from contact with mold spores.

  • Eye irritation from spores becoming airborne and entering your home.


In severe cases, prolonged exposure to mold can lead to more serious respiratory conditions, chronic sinus infections, or even lung damage.


The Impact of Algae Growth

While algae may not be as directly harmful to human health as mold, it still presents some risks. Algae, particularly on exterior surfaces like roofs or decks, can make areas slippery and hazardous to walk on. This increases the risk of slips and falls, especially in wet conditions. Moreover, if algae is left unchecked, it can contribute to the breakdown of your home's exterior surfaces, leading to structural damage, which can create entry points for moisture and mold growth.


Preventing and Treating Mold and Algae Growth


To protect your home and your health, it’s essential to regularly inspect and clean your home’s exterior. Here are a few tips to prevent mold and algae buildup:

  1. Regular Cleaning: Pressure washing or soft washing your home’s siding, roof, and deck can remove mold and algae buildup before it becomes a problem. Professional exterior cleaning services like Bayside Clean can ensure these harmful substances are thoroughly removed without damaging your property.


  2. Gutter Maintenance: Clogged gutters can cause water to overflow and create damp conditions on your walls, roof, and foundation, encouraging mold growth. Regular gutter cleaning is crucial in preventing this.

  3. Improve Ventilation: Proper airflow around your home, especially in shaded areas, can reduce moisture and help prevent mold and algae growth. Trim back any trees or shrubs that block sunlight and trap moisture.

  4. Inspect for Leaks: Keep an eye out for any cracks or damage on your home's exterior where water could seep in. Sealing these areas will help prevent moisture buildup.


The Bottom Line: Keep Your Home Safe

Maintaining your home’s exterior isn't just about keeping it looking good—it's about protecting the health of your family. Mold and algae growth can lead to serious health problems, and by taking proactive steps to remove and prevent their growth, you’ll ensure a safer, healthier living environment.


At Bayside Clean, we offer professional exterior cleaning services to help you keep mold and algae at bay. Contact us today to learn how we can help protect your home and your health.


Stay tuned for more tips on keeping your home clean and safe!

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