An Island Manufacturer Since 1977

An industry leader for over 40 years on Vancouver Island, and still breaking new ground.

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

  • 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 in Cobble Hill, BC.

  • 2022

    Thermoproof triple-pane Energy Star Most-Efficient windows are introduced

  • 2025

    Coming Soon: 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.

Thermoproof, positive.

Warmer Winters, Cooler Summers

Thermoproof Windows & Doors mean big energy savings, more light, better airflow — and even a quieter home.