After spending $$$ on design and installation of high end finishes in an apartment corridor, why install the same door threshold as you would in a single family home’s back door? And why use the cheap, default white door gasket? Because those details are standard for garden-style apartments and often overlooked with enclosed corridors. There are several shades of door gaskets available at the same price as white, choose one that somewhat blends with your door and frame color. Thresholds are more complicated due to issues with HVAC, accessibility, adjacent material heights, durability and fit. Stone thresholds are often found in hotel entries and present the best aesthetic option, but come with less flexibility in some of the other issues mentioned. A potential compromise is a dark bronze aluminum threshold. Focus on these details!