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1-3/4" thick sash


Overall jamb width is 4-9/16"


3" straight legs on half-circles


Constructed of pine, with pine interior stops and wood

mull casings on mulled units


Energy efficient, insulating LoE


-270 glass


Glazing is sash set to the interior with beveled wood

glazing beads


All exterior wood parts are treated


.050" thick, 6063 extruded aluminum alloy frames are

press fit on to the wood frame exterior of all units


Accessory grooves are integral to the extruded frames

for the easy addition of accessories


Frame corners are mitered or profile cut, with internal

corner and end keys screwed into the joints and

injected with sealant


Sash exterior is covered with .062" thick, 6063

extruded aluminum alloy


70% PVDF fluoropolymer finish on frame and sash


(meets performance requirements of AAMA 2605)


Fully weatherstripped for a tight seal


Standard radius shapes include quarter-circles, half-

circles, full-circles, ovals and ellipticals


Heavy vinyl nailing fins*

Radius Standard Features

NOTES: All measurements are nominal.

*Standard only on units without brickmould.

Vinyl nailing fin

applied as standard

to units without


114 Kolbe Ultra Series

Kolbe makes radius windows in stand-alone full circles, half-circles, quarter-circles, elliptical, ovals and custom shapes.

Half-circle or elliptical windows can be stacked over other Kolbe windows and doors to create larger window walls. We

build our radius windows to order so that their profiles match those of the windows they complement.