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There's no better roof than a Thomson roof.

We specialize in care 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!

Anne S.

November 15, 2016

Professional and reliable

Diane T.

November 11, 2016

We are surrounded by trees and had a substantial moss problem. We had the original treatment two years ago and have been moss free since then.

Leslie M.

November 4, 2016

Person who did the work, was very polite and explained what he was going to do. He assured me he would check the roof and flashings etc. and let me know if anything needed attention. That was the info I was looking for—- thank you.

Joanne H.

October 26, 2016

You guys did a great job!!!

Barb B.

October 20, 2016

They came, they were polite– they did their job quickly and they cleaned up well!

Craig. B

October 16, 2016

The service was prompt and completed quickly. Thanks!

Mrs A.

October 15, 2016

10 out of 10 – Because you come when you say you will and you work neatly

Gerry G.

July 27, 2016

Thanks for the prompt service and excellent job.

Catherine M.

July 26, 2016

The company arrived promptly at the booked time to remove moss on my roof. The young man that arrived was pleasant and professional and he went immediately into action to start the job. Another worker arrived later to assist. The roof had very heavy moss coverage over 1/4 of the area with the rest having … Continued

Tracy O.

July 17, 2016

My experience with the services provided by Thomson Roof Treatment was completely positive! The work they did to remove the moss from our VERY steep and high roofs was incredible. Their employee…was totally professional and worked tirelessly in extremely hot conditions to remove the moss from our roof and all of the gutters. Both our … Continued