Moss is an annoying pest for homeowners. Not only is it a cosmetic issue, but it can also cause problems that will reduce the life of your roof. If moss is growing on your asphalt shingle or tile roof, you need to take steps to have it physically removed as well as to take steps to prevent its regrowth.

What Does Moss Do to a Roof?

Moss shortens the lifespan of your tile or asphalt roof. It’s porous and retains water, leading to mold growth, rot, and bacteria. Despite its innocuous appearance, moss, especially when wet, exerts significant weight on the roof, potentially adding hundreds of pounds. Just a few spores on your roof can initiate rampant moss growth.

Structural Deterioration

Moss thrives by extracting moisture from the environment. Once it establishes itself on the roof, its roots penetrate under shingles or clay tiles, gradually dislodging them. Over time, these roots cause structural damage, resulting in leaks and other costly repairs.

Attracting Pests

Moss-covered roofs become inviting habitats for critters seeking shelter and nesting grounds. Eliminating moss addresses aesthetic concerns and prevents pest infestations in your home.

Makes Your Home Look Unsightly

Most homeowners prefer their homes not to resemble scenes from “Lord of the Rings.” Moss can deter potential buyers and inspectors when selling your home, signaling neglect and potential structural issues.

Should You Climb Up on a Roof That Has Moss?

No. Climbing onto a moss-covered roof is hazardous due to its slippery surface, exacerbated by the presence of algae. While inspecting your roof from the ground is advisable, seek assistance from a roofing professional for closer examinations.

How Did Moss Get Up There in the First Place?

Moss is a very vibrant and resilient plant. All it takes for growth is a little bit of moisture and organic debris. If your roof is damp, doesn’t get a lot of direct sunlight throughout the day, and is cool, there’s a good chance that moss is going to grow. Roofs that are north-facing and have clay tile and a lot of shade have an increased chance of moss growth. Moss is insidious in that it might grow underneath clay tiles or asphalt shingles. You may have a problem with moss and not even know it. This underscores the importance of having your roof professionally inspected regularly.

An Ounce of Prevention

Homeowners should consider what they can do to limit the growth of moss on the roof. The best way is to expose your roof to as much sunlight as possible. While you can’t change the position of the sun, nor can you change the orientation of your house, you can ensure that no branches or trees are hanging over your roof and blocking the sunlight. Trim the trees closest to the roof to minimize bacteria from sticks, twigs, and branches that will grow on the roof.

Take the time to get your gutters cleaned to ensure they are free of debris, leaves, branches, and other organic materials that can encourage moss growth. Your roof’s drainage system needs to be working well to prevent moss from accumulating due to rain or moisture.

Is Moss Dangerous to Humans?

No. Unlike mold and mildew, which can pose serious respiratory issues, moss is relatively harmless. However, if you let it grow on your roof, it will create and exacerbate water damage and other problems. Moss can eventually create thin spots in your roof that lead to leaks.

Contrary to popular belief, metal roofs are not 100% impervious to moss growth. True, metal is a lot more durable than clay or asphalt. However, all it takes is for some organic material to adhere itself to the metal roof, add moisture and moss spores, and moss growth will commence. No type of roof is 100% immune to moss or algae growth.

Work With Roseville’s Most Trusted Roofing Company

At Clark's Gables Roofing, we have been in business for more than three decades. We focus on completing one roof at a time. In most cases, we can have a roof completed in three days or less. We specialize in concrete tile repairs and storm damage. Our goal is to create high-quality protection that looks great for your home or business.

Our services include residential roof repair and replacement. We offer roof design and install tile roofing and roof shingles. Contact Clark's Gables Roofing today, and let us put our attention to detail and customer care to work for you.

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