About Us

Serving Vancouver Island Since 1980

Thomson Roof Treatment has been the name for moss removal on roofs in Victoria for over 35 years. Our effective, pet- and garden-friendly, moss and mildew removal spray has created a loyal following in the city.

When Doug Finnigan and his wife Lynn took over in 2002, Doug realized that his work was his best form of advertising, and he began to incorporate the service of manual moss removal and gutter clearing into the job.

High demand for repeat service gave Doug the idea to create the "Roof Maintenance Package," so that at the end of every client’s warranty, they would be able to have their roof treatment reapplied at an even lower cost than their initial treatment.

Doug and Lynn continue to give their all to growing Thomson Roof Treatment and are very pleased to offer this service to you!

Get in touch today for a free quote!

Meet our team

Doug Finnigan

Doug and his wife Lynn have lived on Vancouver Island their entire lives and have owned Thomson Roof Treatment since 2002. Doug’s vision for Thomson Roof Treatment was to take an already successful island business to the next level. Through his hard work, attention to detail, and passion for providing the best quality service, he has brought that vision to life. Having worked on roofs for over 20 years, Doug has the expertise required to ensure the best possible result every time.

Lynn Finnigan

As co-owner of the business, Lynn wears many hats, from providing estimates and scheduling treatments to answering customer calls and managing communications between the office and crew. She provides support wherever it’s needed and is described by her children as the glue that holds everything together. Outside of running the business, she enjoys spending time with her grandchildren and serving as a caregiver for people with disabilities.

Courtney Denninger

Business Manager
Courtney was born and raised in Victoria and has been involved in the family business in a formal capacity since 2010. She is the Business Manager, responsible for radio & television marketing, as well as liaising with the accountant and office manager. Her favourite part of her job is having the opportunity to help her parents and see the family business grow. Outside of work, Courtney enjoys spending time with her husband and three children.

Kathryn Tate

Office Manager & Online Marketing Specialist
Kathryn has been the office manager and online marketing specialist since June of 2015. She spends time connecting with every customer, making sure their questions are answered. Kathryn manages the client database, so that quotes, orders and invoices are prompt and correct. Look out for her friendly enthusiasm when you need a re-treatment for your roof or get in touch with Thomson Roof Treatment. Outside of work, Kathryn sings in a choir, hikes, gardens and runs around after her seven children.