Install Contrasting Edge Trim

What happens here

With the main tread boards laid, the worker then installs the darker gray composite trim pieces around the edges of the steps. These trim boards create a clean, finished border and provide a visual contrast to the lighter treads. The worker uses a cordless drill/driver to fasten the trim, completing the basic structure of the multi-tiered stairs. This step often involves precise miter cuts for the corner pieces.

Goal: Apply decorative and protective trim to the stair edges.