Whether you are a home owner or contractor, Rainier Building Supply has everything you need for your project. Everything is custom made to your exact specifications by our expert craftsmen with little lead time needed. We focus on metal for siding, roofing, and waterproofing contractors. We specialize in standard flashing, custom flashing, saddles, vent shrouds, custom caps, collector boxes, door pans, and much more. Our extremely knowledgeable sales team will draft, design and manufacture the exact flashing materials required for your project.