You may have come across a word or two in your door buying process that needed clarification or explanation. Our A – Z glossary provides a list of Common Entry Door Terms and specialized terminology.
A ½ lite (or Half-lite) is a single (or dual insulated) glass pane that spans ½ height of the door
Traditionally 4 lite doors came with 4 separate glass panels. These are known as True Divided lites (TDL).
Contemporary 4 lite doors come with a dual insulated glass sheet divided into 4 Simulated Divided Lites (SDL). Muntins and spacer bars are used aesthetically to to create the illusion of True Divided Lites.
Read our Definitive Guide to Fiberglass Entry Doors, here.
Muntin in a True Divided Lite (TDL) glass insert is a thin strip of wood or metal that separates and holds pieces of glass in a grid system of small panes called “lights” or “lites”.
A Munin in a Simulated Divided Lite (SDL) glass insert is a thin strip of wood or metal adhered to the exterior surface of a double or triple insulated glass pane to simulate the appearance of divided lites. SDL’s also typically contain “Spacer Bars” that separate and strengthen the dual insulated glass panes from within, creating an illusion of true divided lites.
Muntins are also called “muntin bars”, “sash bars” or “glazing bars”.
Weatherstripping is the process or material used in sealing doors from external elements (water, cold/heat, dust). Weather-stripping is also used to keep interior air indoors, to save energy.