Victoria's roof demossing experts for 40+ years.

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Trusted for 40+ Years

Roof Moss Removal Services in Victoria BC

Drawing on more than 40 years of experience providing moss removal services in Victoria, BC, our professionals take extra care to remove visible moss by hand before neutralizing moss down to its roots. After cleaning any fallen debris, we protect your investment with our moss-free guarantee of up to 2 years. See why so much of our business consists of repeat customers thanks to our commitment to service and professionalism.

Roof top against blue sky to show Roof Moss Removal Services from Thomson Roof Treatment in Victoria BC

Why Victoria homeowners choose Thomson

40+ years serving Greater Victoria since 1984
Over 10,000 roofs treated across the region
580+ verified reviews, 4.5-star average
BBB Accredited, A+ rating
RCABC member company
WorkSafeBC certified (No. 200670049)
Fully insured. Documentation available on request
Non-toxic, pet and garden-safe solution

Thomson Roof Treatment team and vehicles.

Moss Removal Specialists

Extend the life of your roof

Moss will continue to grow and rot your roof over time, which makes maintenance and prevention a key component in extending the lifespan of your roof. In addition to improving the appearance of your roof, our moss removal services delay the need for a roof replacement by preserving its condition.

Improved appearance
Extended roof lifespan
Peace of mind
Guaranteed for 1-2 years

Improved appearance
Peace of mind

Extended roof lifespan
Guaranteed for 1-2 years

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Roof Preparation

We prepare your roof for treatment by meticulously removing the majority of visible moss by hand while taking special care to respect your roof. Small hand tools and a leaf blower are used to remove loose debris from the roof, skylights, and gutters, and then we tidy up the grounds before we leave your property.

We do not use pressure washing, which can damage your roof and is not recommended by roofing product manufacturers, the Roofing Contractors Association of BC, and Consumer Reports, among others. See "Consumers Guide to Roofing.”

Moss Treatment Application

We take care to apply Thomson Roof Treatment to the whole prepped roof surface. Our Treatment is a unique, non-toxic solution and is safe for pets and gardens! It neutralizes any remaining moss, lichen, mold, or mildew spores or root systems that can't be cleaned by hand. Once completely dead, all remaining moss debris unable to be removed by hand without damaging your roof, will be rinsed from the roof over the following months of rain, making it look like a new roof! Our gentle, saturating method of application means your roof stays moss and mildew free for 12-24 months.

Our Process

We remove visible moss by hand before neutralizing it down to its roots.

Aerial view of residential neighborhood rooftops

Our Warranty

Our moss-free guarantee covers your roof for up to 2 years.

WHAT WE CAN DO FOR YOU

Our Roof Moss Removal Services

We specialize in moss removal that will help preserve the life of your roof while improving the look of your home.

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Preparation

We remove visible moss by hand, taking special care to respect your roof!

Application

We apply our non-toxic, pet and garden-safe solution to the prepped roof surface.

Maintenance

We guarantee your roof will remain moss-free for 1 to 2 years and book you for retreatment.

We have been in business in Victoria, BC for over 40 years!

K+

Over 10,000 clients served in the city of Victoria and surrounding areas.

Nearly 600 clients have left us reviews with an average rating of 4.5 stars!

THOMSON ROOF TREATMENT, YOUR VICTORIA DEMOSSING SPECIALISTS

We specialize in roof moss removal to help preserve the life of your home.

Thomson is an accredited member of the Better Business Bureau with an A+ rating

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FAQ

Frequently Asked Questions

The cost of roof moss removal in Victoria depends on your roof size, pitch, and the amount of moss growth. Contact us for a free inspection and customized quote.

Not with Thomson's method. We remove moss by hand and apply a non-toxic treatment. We never use pressure washing, which strips shingle granules and voids manufacturer warranties.

Your roof is guaranteed to be moss-free for 1–2 years. Most clients book retreatment at the 2-year mark through our Moss Prevention Program.

Yes. Our solution is non-toxic, biodegradable, and safe for pets, children, and garden beds. No need to clear the yard before we arrive.

Moss PREVENTION

Our Moss Prevention Program

One treatment keeps your roof clean for 1–2 years, but staying on the program ensures continuous protection and more affordable future care. We track your warranty and schedule your retreatment before moss takes hold again. Roofs must be re-treated promptly at the end of the warranty period to prevent moss from re-rooting; delaying care does not reduce long-term costs. If a retreatment order is made after the warranty expires, an additional charge will apply for the required hand-prep due to moss regrowth.