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Moss Removal and Roof Cleaning Experts

Exceeding client expectations in Victoria BC for over 35 years! We specialize in moss removal, roof cleaning and roof maintenance. Our entire family and staff are committed to meeting the high standards of moss removal and roof maintenance our customers demand. As a result, a large percentage of our business for decades has been from repeat customers. We get alot of referrals by Insurance Companies, Roofing Contractors and Home Inspectors because Thomson Roof Treatment exemplifies the method of regular roof maintenance RCABC recommends.

We would welcome the opportunity to earn your trust and deliver you the best service for moss removal in Greater Victoria, Saanich, Esquimalt, View Royal, Sidney, Colwood, Langford, Sooke and the Capital Regional District.

Click for the BBB Business Review of this Roof Cleaning & Stain Removal in Victoria BC

Our Mission

Our mission is to provide quality roof care that preserves the life of your roof and improves the look of your home.

Manual Removal

We remove moss by hand that has accumulated and is damaging the roof structure by trapping moisture in the seams of roof shingles and flashing. Doug and his team clean away the loose debris from the roof, clear out your gutters and always tidy up the grounds before they leave your site. Your roof will immediately have more curb appeal!


We gently apply Thomson Roof Treatment! It's a unique non-toxic solution and is safe for pets and your garden. Our treatment saturates the roof shingles and neutralizes any moss, lichen, mold or mildew present. That means all the microscopic spores and root systems are killed immediately and continue to wash away for the coming months of rain. Most importantly, we use a gentle, saturating method of application; we do not use pressure washing, which can damage your roof.


After Thomson Roof Treatment has removed the moss, lichen and mildew from your roof and cleared the gutters so they flow properly- you receive a guarantee! TRT's warranty means that your roof will remain moss, lichen and mildew free for up to 2-years or we will return to make sure that you are satisfied, at no cost to yourself. Doug and his crew assess each roof individually and always provide you with a guarantee in writing.

Get in touch today for a free quote!

John W. 10 out of 10

March 5, 2019

I am a qualified experienced Roofing Consultant. Thomson is the ONLY moss control company I would recommend and refer.

George S. 10 out of 10

March 5, 2019

Treatment works and very good service

Sylvia M. 9 out of 10

March 4, 2019

I am pleased, but did not check with any other methods first.

Burnside Strata 9 out of 10

March 2, 2019

Client didn’t leave any feedback

Colleen B. 9 out of 10

February 28, 2019

Client didn’t leave any feedback

Bonnie B. 8 out of 10

February 23, 2019

Client didn’t leave any feedback

Friedhelm J. 9 out of 10

February 1, 2019

So far you have lived up to your standards. It would be helpful if after completion the technician could give a short report on the condition of the roof

Nancy G. 10 out of 10

February 1, 2019

We are really pleased with your excellent product and service.

Costain L. 10 out of 10

January 31, 2019

Client didn’t leave any feedback

Trina H. 10 out of 10

January 31, 2019

Because you are organized, efficient, and clearly know what you are doing. Very friendly and helpful. Everything any customer could ask for. Thank you.