Learn Why Moss Removal by Brushing is Unacceptable for Roof Cleaning Near The Greater Seattle Area, Bellevue, Everett, Redmond

Why no brush moss roof cleaning

Pictured near Seattle: workers using no fall protection.  Ruining the roof by aggressive use of brush to remove alive moss spores and spread the moss mess everywhere to simply regrow again

Homeowners in the Seattle, Bellevue, and Everett areas, it’s crucial to be aware of the risks associated with improper moss brushing roof cleaning.

Some companies out there are neglecting your roof’s lifetime and disregarding safety, putting your family’s shelter at risk. This blog aims to shed light on the dangers and guide you towards making informed decisions about your roof’s care.  Moss removal by brushing should never be used.

  1. Roof Types in the Area:

In the greater Seattle area, approximately 80% of roofs are made from asphalt shingles. While they may appear sturdy from a distance, these roofs are actually delicate and soft when you take a closer look.

  1. The Dangers of Inadequate Roof Cleaning:

Let’s break down what’s wrong with the image below and roof moss brushing:

  • The workers on the roof are not secured with fall protection gear, a crucial safety requirement when hiring a roof cleaning company.
  • If one of these workers were to fall and get injured on your property, you would bear some responsibility, especially if you chose the lowest-cost roof cleaning company. (make sure to hire a bonded and insured service company for Seattle area roof cleaning)
  1. Damaging Techniques: When brushes are employed to scrape off live roof moss, it inadvertently exacerbates the issue. In essence, you’re unintentionally creating a moss farm on your property. Moss spores, which are microscopic, remain alive when brushed onto a roof. Initially, the roof might appear moss-free, but it quickly returns and regains control.

Furthermore, when workers brush away the moss, the living moss and its spores find their way to ground surfaces

As evidenced in the image below, consider the walkway, which is now covered in moss. The live moss, once brushed, becomes akin to sawdust, often blown off the roof during aggressive cleaning. However, it doesn’t stop at the walkway; it infiltrates other areas such as lawns, garden beds, decks, and hardscapes.This is why the practice of brushing moss off your roof is not only ineffective but also counterproductive. It results in unnecessary expenses for Greater Seattle area homeowners, from premature roof replacements to the pervasive growth of moss not only on the roof but throughout the surrounding surfaces, effectively creating yet another moss-infested area in the community.

Another concerning aspect is the use of stiff brushes to scrape off moss

Asphalt shingle roofs are designed to last 30 years, but using a brush can significantly damage the roof, reducing its lifespan.

  1. Moss Removal Myths:

Many homeowners are unaware of how soft their asphalt shingled roofs really are. Companies take advantage of this lack of awareness and aggressively remove moss, spreading it around and turning your property into a moss farm.

  1. The Importance of Knowledge:

Knowledge is power, and it’s essential to be informed. With over 20 years of roof cleaning experience in the East Side area, I can confidently tell you that allowing workers to scrape your roof’s top layer is not in your best interest.

  1. Follow Manufacturer’s Instructions:

To protect your roof investment, consider following the manufacturer’s instructions. Roofs in the East Side area can cost over $40,000 to replace, so reading the maintenance guidelines that came with your roof is a wise decision.

  1. Opt for Soft Wash Solutions:

Rather than aggressive methods like brushing, roof manufacturers recommend using soft wash solutions for moss removal

Following these instructions ensures that your roof can last for its intended 30, 40, or even 50 years.

Roof granular brushed from roof near Seattle, Bellevue, Everett areas

Roof granular loss after brushing an asphalt shingled roof. It is important to note the top layer of roof is not supposed to be brushed off. Obvious damage has occured up close.


Don’t put your roof at risk by hiring inexperienced or careless roof cleaning companies. Protect your investment, ensure your family’s safety, and maintain the longevity of your roof by following the manufacturer’s guidelines and choosing safe and effective cleaning methods. Your roof is your first line of defense against the elements; treat it with care and make informed decisions.

Contact Chinook Services (425)290-8635

More information on effective safe roof cleaning moss removal

Greater Seattle Area: From Sea Tac to Northgate

Seattle Roof Cleaning

Greater Bellevue area: all of the Eastside – Redmond, Woodinville, Sammamish etc

Bellevue Roof Cleaning

North Sound area

Everett Roof Cleaning