Don’t Let Your Roof Be a Breeding Ground for Mold & Moss

Daphne Jane De Leon
Aug 7
1 min read

Updated: Aug 13

Loyal Exterior Cleaning Two roof images: top is clean gray shingles, bottom has brown moss patches. Background has buildings and trees under a cloudy sky.

Southern California may be known for its sunshine, but shaded roofs and coastal moisture create the perfect conditions for mold, moss, and algae to thrive, especially in late summer and early fall when mornings are damp but days stay warm.

If your roof is surrounded by trees or sits in partial shade, it’s at a higher risk for biological growth. Over time, moss and mold don’t just look bad; they break down roofing materials, trap moisture against your shingles or tiles, and shorten the lifespan of your roof. In some cases, that trapped moisture can even lead to interior leaks or encourage pests like termites.

Loyal Exterior Cleaning Roof tiles shown in two sections: top with mossy green growth and bottom clean and restored, highlighting a before-and-after cleaning effect.

Mold spores can also travel through your HVAC system and into your home or business, affecting air quality and potentially triggering allergies or asthma.

Routine roof cleaning is one of the most cost-effective ways to protect your property investment. Our professional soft wash method safely removes mold, algae, and organic growth without damaging tile or shingle surfaces, no harsh pressure, no risk to your roof.