What's a casing? Something you put sausage in? What's a window stool? Is it something like a barstool? How about an apron or a profile? These are all woodworking terms that describe trim around a door and window. Now, if you're just going to be painting and cleaning, referring to it all as 'trim? is fine. If, however, if you're going to be doing some trim work, you'll need to know a little bit more to effectively communicate with the folks down at the lumber yard. The basic trim that runs around a window or door is called ?casing.? A window usually sits on the window stool, which you know better as the windowsill. Underneath the stool (or sill) is the decorative apron. These components come in many shapes and styles called trim ?profiles.? Knowing the correct terminology makes getting what you want easier. And that's the On The House tip for today.