Treated Fir

Strong, stable, and built to endure the elements, treated fir combines the structural reliability of Douglas Fir with the protective benefits of pressure treatment. We offer high-quality treated fir lumber ideal for decks, outdoor framing, landscaping structures, fences, and exposed exterior applications where strength and resistance to decay are essential. Douglas Fir is known for its exceptional strength-to-weight ratio, straight grain, and minimal warping, making it a preferred choice for load-bearing and framing projects. When pressure treated, it gains enhanced protection against moisture, rot, insects, and fungal damage, making it suitable for Canada's demanding outdoor conditions. As a proudly Canadian company, Windsor Plywood specializes in durable, hard-to-find building materials and provides expert, personalized service. Whether you're constructing a sturdy framework or building an outdoor feature that lasts, treated fir offers the resilience, dependability, and quality you can trust.