How They're Made

Divided Lite Construction

Simpson has been manufacturing divided lite doors for over a century and provides two basic construction types, Simulated Divided Lite (SDL) and True Divided Lite (TDL).

Simulated Divided Lite (SDL) for Exterior Doors

Features a single glass unit with bars applied to the glass surface, providing the look of traditional True Divided Lite with SDL bars are available in two widths: 7/8" (standard) and 1-3/8" (option). SDL construction is available for doors with insulated glass (IG).

7/8" Wide SDL (Standard)

7/8" Wide SDL - NO SHADOW SPACER (Option)

1-3/8" Wide SDL (Option)

1-3/8" Wide SDL - NO SHADOW SPACER (Option)

True divided Lite (TDL) for Exterior and Interior Doors

Features individual glass units divided by muntin bars. TDL construction is available for doors with IG or single glazed (SG).