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Marty Lane 10 out of 10

February 25, 2021

Doug did a fantastic job. Our roof looks great! The clean-up was great! You did the work quickly and thoroughly. I chose your company because of the reviews you received. I’m so glad I did. On a scale of 0-10 you did a 10+ star job! Thank you for providing us with such excellent service!

Frank Varga 10 out of 10

February 22, 2021

Arrived on time. Kept us informed and tidied up. Thank you.

Gina Carradine 10 out of 10

February 16, 2021

We really appreciate you honoring our discount when our time line changed to have you service our roof because of renovations. We have gotten you for years everyone from the front end to individuals doing the work are amazing! You even do our little shed roof which is greatly appreciated. Thank you so much see … Continued

Pam Highton 10 out of 10

February 15, 2021

I have told and recommended your treatment many times over the years. I find the treatment works even with our trees close by. You are also a very quiet business, neat and tidy. I appreciate that.

John O’Connor 10 out of 10

February 13, 2021

Our roof remains moss free whilst several others around us show clear signs of moss developing.

Jennifer Little 10 out of 10

February 10, 2021

I have already referred my neighbour and he has been very happy with his first roof treatment.

Brian Shepherd 10 out of 10

February 9, 2021

I am really pleased with how everything went. A lot more moss came off than I thought was even up there . A job well done.

Ron McLeod 10 out of 10

February 7, 2021

The Thomson staff were extremely professional, well organized and diligent in providing the necessary roof treatment on my house in Sooke. They were also very meticulous in cleaning up the moss and residual debris in my yard. Outstanding service!

Fred Hossack 10 out of 10

February 5, 2021

Excellent service as usual

Deborah Needley 10 out of 10

February 2, 2021

The treatments over the years have extended the life of the roof on my home and garage. Cleaning of gutters was so appreciated. The property was left nice and tidy. Thanks.

Thomson Roof Treatment 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. Therefore, we have exceeded client expectations in Victoria BC for over 35 years! As a result, a large percentage of our business for decades has been from repeat customers.

TRT's referrals are mainly from Insurance Companies, Roofing Contractors and Home Inspectors because Thomson Roof Treatment exemplifies the method of regular roof maintenance RCABC recommends.

We deliver you the best service for moss removal in Greater Victoria, Saanich, Esquimalt, View Royal, Sidney, Colwood, Langford, Sooke and the Capital Regional District.

Worksafe BC Certified #282337

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!