how to remove moss from asphalt shingles

Removing moss from asphalt shingles is an essential maintenance task to preserve the integrity and appearance of your roof. Here is a thorough guide on how to remove moss from asphalt shingles.

The Risk of Moss in Asphalt Shingles

The presence of moss on asphalt shingles can pose several risks and should be addressed promptly. Here are some of the risks associated with moss growth on asphalt shingles:

  • Water Damage: Moss retains moisture, and when it grows on the surface of asphalt shingles, it can prevent proper water drainage. This can lead to water pooling and seepage under the shingles, potentially causing leaks, rotting of the underlying structure, and water damage to the interior of the building.
  • Shingle Damage: As moss grows and expands, it can lift the edges of the shingles, causing them to become loose or even dislodged. This exposes the underlying layers of the roof and compromises its integrity. Over time, moss can erode the granules on the shingle surface, leading to premature wear and reduced roof lifespan.
  • Structural Issues: Moss growth can compromise the structural integrity of the roof. The weight of the moss, especially when it becomes wet, adds additional stress to the roofing system. This can lead to sagging or even structural damage if left unaddressed for an extended period.
  • Decreased Energy Efficiency: Moss-covered roofs may have reduced energy efficiency. The moisture retained by the moss can hinder proper ventilation and insulation of the roof, resulting in higher energy costs for cooling and heating the building.
  • Aesthetics and Curb Appeal: Moss growth on asphalt shingles can significantly detract from the appearance of a building. It gives the roof a worn, unkempt, and aged look, which can negatively impact the overall curb appeal and value of the property.

Step by Step on How to Remove Moss from Asphalt Shingles

Removing moss from asphalt shingles is an essential maintenance task that helps prolong the life of your roof. Here is a step-by-step guide with detailed instructions on how to remove moss from asphalt shingles:

Safety Precautions:

  • Wear protective clothing, gloves, goggles, and a face mask, to avoid direct contact with the moss and any cleaning solutions.
  • Use a sturdy ladder and ensure it is adequately secured before climbing the roof.
  • Take precautions to prevent slips and falls, especially if the roof is wet or slippery.

Gather the necessary tools and materials:

  • Stiff-bristle brush or broom with a long handle
  • Garden hose or pressure washer (optional)
  • Moss-killing solution (commercial moss remover or a homemade solution)
  • Bucket
  • Safety harness (optional but recommended for added safety)

Prepare the moss-killing solution:

  • If using a commercial moss remover, follow the instructions on the product label.
  • Mix equal parts of white vinegar and water in a bucket for a homemade solution. Alternatively, you can use a mixture of 1 part bleach to 3 parts water. Add a few drops of dish soap to help the solution adhere to the moss.

Wet the roof:

Thoroughly wet the roof with water using a garden hose or pressure washer on a low setting. This helps prevent damage to the shingles during the cleaning process and makes it easier to remove the moss.

Apply the moss-killing solution:

Carefully apply the moss-killing solution to the affected areas, focusing on the moss-covered sections of the roof. Use a sprayer or a brush to distribute the solution evenly. Avoid oversaturating the shingles.

Let the solution work:

Allow the moss-killing solution to sit on the roof for the recommended time, usually around 15-20 minutes. This gives the solution enough time to kill the moss and loosen its grip on the shingles.

Scrub the moss:

Using a stiff-bristle brush or broom, gently scrub the moss-covered areas. Start from the top of the roof and work down, applying moderate pressure to dislodge the moss. Be careful not to damage the shingles while scrubbing.

Rinse the roof:

Rinse the roof thoroughly with water to wash away the loosened moss and any remaining moss-killing solution. Use a garden hose or pressure washer on a low setting, being mindful of the water pressure to avoid damaging the shingles.

Repeat if necessary:

If stubborn moss remains, repeat the moss-killing and scrubbing process until the roof is moss-free. Be patient and persistent, as it may take multiple attempts to remove all traces of moss altogether.

Prevent future moss growth:

To prevent moss from regrowing, trim overhanging tree branches that provide shade and retain moisture on the roof. Clean gutters regularly to ensure proper drainage and prevent debris buildup. Additionally, consider applying a moss inhibitor or zinc strip to the roof to inhibit future moss growth.

Remember to exercise caution and prioritize safety throughout the process. If you need more clarification or are uncomfortable with performing the task yourself, it’s advisable to consult a professional roofing contractor for assistance.

Perks of Removing Moss on Asphalt Singles Regularly 

Removing moss from asphalt shingles provides several benefits for your roof and overall property. Here are some of the key benefits:

  • Roof Longevity: By removing the moss, you can help extend the lifespan of your roof, saving you from the cost and inconvenience of early roof replacement.
  • Prevent Water Damage: Removing moss helps maintain the waterproofing integrity of the roof and prevents water-related issues.
  • Preserve Aesthetic Appeal: By removing the moss, you can restore the clean and well-maintained look of your roof, enhancing the curb appeal and value of your home or building.
  • Prevent Structural Damage: By removing the moss, you help maintain the structural integrity of the roof, preventing sagging, structural damage, and the need for costly repairs.
  • Improve Energy Efficiency: Moss-covered roofs can hinder proper ventilation and insulation, decreasing energy efficiency. Removing the moss promotes better airflow and insulation, which can help reduce energy costs for cooling and heating your property.
  • Prevent Health Hazards: Moss growth on roofs can create a damp environment that promotes the growth of mold and mildew. These fungi can harm your health, causing respiratory issues and allergies. By removing the moss, you mitigate the risk of mold and protect the indoor air quality of your property.
  • Maintain Warranty Coverage: By adhering to these maintenance requirements, you ensure that your warranty remains valid and can take advantage of any coverage.

Moss Removal: Why Consider a Professional

Calling an expert to remove moss from asphalt shingles can be beneficial for several reasons:

  • Safety
  • Expertise and Experience
  • Preventing Damage
  • Thorough Cleaning
  • Preventing Regrowth
  • Time and Convenience
  • Warranty Considerations

Overall, calling an expert for moss removal from asphalt shingles provides peace of mind, saves time, and ensures a thorough and safe cleaning process. Consider consulting with reputable roofing professionals to assess your needs and determine the best course for removing moss from your asphalt shingle roof.

Water Damage and Roofing of Cedar Park
305 Spanish Mustang Dr
Cedar Park, TX 78613, United States