This guide provides a comprehensive comparison of six stair nosing materials — carborundum, photoluminescent, FRP, aluminum, brass, and rubber — for commercial and multi-family building specifications. It evaluates each material's slip resistance, durability, maintenance requirements, building code triggers, and ideal use cases, from high-traffic transport terminals and industrial facilities to luxury hotels and healthcare environments. The article also covers combined carborundum + photoluminescent nosings for emergency egress compliance and highlights the often-overlooked safety feature of visual contrast for ADA compliance. Designed for specifiers, facility managers, and procurement professionals, this guide helps balance safety, longevity, and total cost of ownership.