whats a Ruff-In inspection for existing commercial space where everything is already for most part covered? we mostly do residential new builds and some commercial maintenance. its my first existing commerical job. we are adding some conduit between floors and in exising ceiling tile. i know not all areas are the same but would you normally call in a ceiling or ruff-inspection or both? and would you install wire in conduit for ceiling or ruff in? just asking.