Get a Quote

Moss free roofs from Victoria to Cowichan Valley

We specialize in moss removal that will help preserve the life of your roof while improving the look of your home. The only treatment of its kind, we have been providing service to lower Vancouver Island since 1980. Our work is effective and guaranteed in writing.

Our Mission

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


includes manually removing moss that has accumulated. A blower is used to remove loose debris from the roof and gutters, and then to tidy up the grounds before they leave your site.


involves applying Thomson’s unique non-toxic soap based solution, which neutralizes any moss, lichen, mould or mildew present. We use a gentle, saturating method of application; we do not use pressure washing, which can damage your roof. 


guarantees that your roof will remain moss free for a specified number of months or we will return to make sure that you are satisfied, at no cost to yourself. We assess each roof individually, and will provide you with the most accurate warranty we can.

Get in touch today for a free quote!

Heather G. 10 out of 10

April 13, 2018

I had my roof treated 2 years ago. I have been delighted with the result. There is a house on the hill above me, I was on their deck looking down on my own roof and 3 neighbours all in a row. All the other roofs had a lot of moss, but mine looked great. … Continued

Loretta M. 10 out of 10

April 13, 2018

From past experience using Thomson Roof Treatment and our present experience, we are very satisfied with their knowledge, efficiency and cleanup. When the time comes we will once again call Thomson Roof Treatment to do the job again.

Cheryle P. 10 out of 10

April 12, 2018

We were very happy with the work done. The workers were professional and gave advice about our roof. They also cleaned up nicely. Thank you.

Kim R. 10 out of 10

April 12, 2018

Client didn’t leave any feedback

John K. 10 out of 10

April 12, 2018

The workers on my were very diligent and very good at clean up, thanks to everybody involved. John and Anne K.

David M. 10 out of 10

April 10, 2018

Properly informed of arrival time and when that did not work phoned to explain delay due to illness. Job done the next day. Very professional.

Matt B. 10 out of 10

April 4, 2018

Have been using your services for many years and the job has always been good.

Patricia D. 9 out of 10

April 3, 2018

Efficient, friendly workers…Roof looks good and cleanup great

Jan and Eugene P. 10 out of 10

March 30, 2018

Client didn’t leave any feedback

Carol P. 10 out of 10

March 28, 2018

Quick and efficent. Good moss clean up Thank you