Glossary I

In-the-white-
	Natural or unpainted wood.
Inner Casing-
	An entrance member that fits over the outside edges of the side and head jambs, thereby providing a base for the pilasters; an entrance casing nearest to the opening that provides a base for the pilasters.
Inner Frame-
	On a panel door, the intermediate panel member between the stile and door panel that accentuates the sticking of the door.
Insulating Glass-
	Two or more pieces, lights or panes of glass separated by a hermetically sealed air space, typically 3/16 to 1 inch wide. Manufacturing of insulating glass began in 1930.
Interior Casing-
	A casing that trims the interior of window and door frames; three pieces of casing are required, namely two of the side casing and one of the head.
Intermediate Rail-
	A rail of a door located between the top and bottom rails.