An Island Manufacturer Since 1977

Proudly Canadian. Built on Vancouver Island.
Thermoproof is the longest-running Canadian owned and operated 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. We are the number one choice for windows in Victoria to Nanaimo, Courtenay, Comox and Salt Spring Island.

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 monthly promotions—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. No matter where you call home from Victoria to Salt Spring Island, our windows are made for you.

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.