Find Your Store
MicroPro Sienna is a premium brand of pressure-treated wood that combines durability, environmental responsibility, and aesthetic appeal—making it a top choice for outdoor projects like decks, fences, landscaping, and freshwater docks. Treated with Micronized Copper Azole (MCA) using advanced MicroPro® technology, MicroPro Sienna offers long-term protection against fungal decay and termite damage. This innovative process is certified by the Canadian Standards Association (CSA) and is suitable for use above ground, in ground contact, and in freshwater applications. One of MicroPro Sienna's standout features is its warm, natural brown tone, achieved through micronized iron oxide pigments added during treatment. As a proudly Canadian retailer, Windsor Plywood offers a wide selection of MicroPro Sienna products, backed by expert advice and personalized service. Choose MicroPro Sienna for your next project and enjoy a blend of beauty, performance, and environmental responsibility.
Frequently Asked Questions
What is MicroPro Sienna and what does Windsor Plywood carry?
MicroPro Sienna is a premium pressure-treated lumber product treated with a micronized copper preservative that gives the wood a warm brown tone rather than the green colour of traditional treated lumber. Windsor Plywood carries MicroPro Sienna in dimensional framing sizes and decking profiles for outdoor structural and above-grade applications.
What makes MicroPro Sienna different from standard pressure-treated lumber?
MicroPro Sienna uses micronized copper technology where copper particles are ground to a microscopic size and suspended in the treatment solution. This provides deeper and more consistent penetration into the wood fibre and results in the warm brown appearance, a significant aesthetic advantage for visible deck framing and structural elements.
Is MicroPro Sienna safe for vegetable gardens and children's play structures?
Yes. MicroPro Sienna uses a copper-based preservative without the arsenic compounds found in older CCA-treated lumber. It is considered safe for vegetable garden beds and play structures when lumber is fully dried before use.
What fasteners should I use with MicroPro Sienna?
Use hot-dipped galvanized, stainless steel, or fasteners specifically rated for use with copper-treated lumber. The copper in MicroPro Sienna reacts with standard zinc-plated and electroplated fasteners, causing rapid corrosion. Joist hangers, post bases, and all structural connectors must also be rated for use with copper-treated lumber.
Can MicroPro Sienna be stained or painted?
Yes. Once the lumber is fully dried after treatment, MicroPro Sienna accepts exterior stains and paints normally. The warm brown base tone blends more naturally with exterior wood stains than the green of conventional treated lumber, making it a better base for semi-transparent stain applications on visible deck surfaces.