A cased opening is a doorway that is trimmed out but does not contain a door. If you want a doorway without a trim, you could ask for an opening or archway. There is plenty of options you can have in this section. Our team of experts is delighted to provide more detail based on your available space. If you have questions about working with ECC Group Design, would like to take a tour of our showroom, or discuss a remodeling project, we are here for you.