Performance Divided Lites
Kolbe’s performance divided lite (PDL) glazing
system gives the appearance of true divided lites
without sacrificing energy efficiency. Extruded
aluminum bars are adhered to the exterior and
wood bars to the interior of the single lite of
insulating glass.* Aesthetically-pleasing spacer
bars are installed within the insulating glass unit.
Together, these bars create the illusion of true
divided lites. PDL bars are available in 5/8", 7/8",
1-1/8", 1-3/4", 2-1/4" or 4-1/2" bar widths. The
exterior finish of the aluminum bars will match the
exterior finish on the unit. Variations on the PDL
option may include custom divided lite patterns, bar
widths or no spacer bars.
* Some intricate designs and coastal applications may have a composite material for
the exterior PDL bar.
True Divided Lites
True divided lites (TDL) give each unit the traditional
look often found in historical projects. Units with
TDL are comprised of 1-1/8" wide wood muntin
bars in between individual 5/8" insulating glass.* The
horizontal and vertical, colonial-style wood TDL bars
interlock with half-lap joints for strength and security.
Profile shadow lines enhance the warm, richness
of the wood on both the interior and exterior. The
exterior finish on the bars will match the exterior finish
of the unit. TDL options include custom patterns and
bar widths, other wood species and interior stain or
* Traditional double hung sash utilize 1/2" LoE insulating glass.
True divided lites are only available for Heritage Series wood units.
Photo courtesy of The Alexis Agency
Glazing Beads & Muntin Bars
For most series, standard glazing beads have a beveled profile, but may also be ordered with an ovolo profile or
square profile. Matching muntin bars are available on units with true divided lites (TDL), performance divided lites
(PDL) and wood removable grilles. Most units ordered with TDL and PDL will have beveled muntin bars on the
exterior, regardless of the profile
chosen for the interior.