Decking

At Builders Alliance, we supply high-quality building materials and construction supplies for everything from custom homes to outdoor renovations. For your next deck or porch upgrade, consider TimberTech—a top-tier composite decking solution that delivers the authentic look of wood without the ongoing maintenance. Engineered for performance and sustainability, TimberTech contains up to 85% recycled content and resists moisture, splintering, cracking, peeling, and rotting, making it perfect for the Washington area climate.

Whether you’re starting a new project or enhancing an existing space, our decking lines are chosen for their quality, reliability, and long-term efficiency. We carry a wide selection of premium brands including Trex, Fiberon, and more. Each of these brands offer durable, eco-conscious options to suit every budget and design vision. Complete your deck with stylish, secure railings built to withstand all weather conditions and activity levels.

Our knowledgeable team offers expert construction services and support through every step of the process, from selecting the right building supplies to professional installation tips. Visit one of our locations to explore our expansive decking displays—including the full TimberTech showcase at our Bellingham store—and discover why we’re a trusted supplier for homeowners and contractors across the region.