Rainier Building Supply provides exterior building materials and envelope systems for residential, multifamily, and commercial projects across the Pacific Northwest. We stock a broad range of products from trusted manufacturers, including cladding, decking, weather-resistive barriers, fasteners, sealants, accessories, and tools—selected for real-world performance and job site efficiency. We work as a partner to our customers and, when a product isn’t readily available, source it quickly and cost-effectively to keep projects moving.
Supporting Complete Exterior Systems Rainier Building Supply helps coordinate complete exterior scopes by aligning siding, WRB, sealants, fasteners, accessories, and custom sheet metal into integrated systems that support long-term performance.
Our in-house Fabrication shop operation provides job-specific flashing and components critical to proper water management and durability.
