Why Thermoproof?
Proudly Canadian. Built on Vancouver Island.
Thermoproof is the only Canadian-owned window manufacturer on Vancouver Island. With over 50 employees, we support hundreds of additional jobs across the region. Every one of our suppliers is based in Canada, ensuring that your purchase directly strengthens the local economy.
Factory-Direct Advantage.
When you choose Thermoproof, you’re working directly with the manufacturer—no middlemen, no markups. Get high-performance windows designed for Island living at factory-direct pricing.
Fair, Transparent Pricing—Always.
We believe in honest pricing. Every quote includes a per-window breakdown. We don’t run sales or offer discounts—so you can buy with confidence, knowing you’re always getting our best price.
Engineered for Island Life.
Vancouver Island’s climate is tough on windows. Exposure to sun and salt-air can cause vinyl to fade and hardware to rust. Our products are specifically engineered with the challenges of the Island’s climate in mind. We use quality Canadian extruded resin, Cardinal LoE Glass, and stainless steel or non-corrosive hardware. Ensuring that you will enjoy your investment for years to come.
Full-Service Support.
From manufacturing, delivery, installation and after-sales service, Thermoproof handles it all. Get expert guidance and a free consultation to find the perfect window solution for your project.
Our Story
We started out with wood windows, transitioned to aluminum and have now perfected our products using PVC. Our components have changed but our focus on exceptional quality and customer service remains steadfast.
1977
Thermoproof manufactured it's first Window.
2000
Thermoproof introduces PVC Window products
2005
Thermoproof Islander Patio Door went into production.
2008
LoE glazing becomes standard. Blocking UV rays and heat in the summer & reflecting heat back inside in the winter
2011
Thermoproof offers expert in-house installation services to builders and homeowners
2017
Courtenay branch is opened. Servicing the Comox Valley
2020
Thermoproof opened a new Factory, Showroom, and Installation Teams in Cobble, Hill.
2022
Thermoproof triple-pane Energy Star Most-Efficient windows are introduced
2025 - Upcoming
Thermoproof innovates again with patented seamless welding technology. Producing unmatched quality and consistency
Renovating Your Home?
Give us a call or email us with any questions you may have about your windows and doors. We want to help you find exactly what you need.