Out-Swing Casement

Out Swing casements open outward for controlled ventilation. They can be fitted with either sill-mounted roto cranks or jamb-mounted push-arm operators.

Photo © Mike Powell

Wood Species
& Finishes

Duratherm sources all its materials by project, only from providers we know and trust. Many of our woods come from Forest Stewardship Council® (FSC- C108949) certified sources. We obtain others from sustainably-harvested plantations. Fourteen domestic and exotic wood species offer a wide range of colors, grains, and textures.

Please contact us for information about finishing options (including paint, Sikkens, clear laquer, stain, bleach stain, oil, etc.) and to discuss the use of a species not on our standard menu. We consider availability, durability, machining, and gluing characteristics to determine the feasibility of your choices.



KEY (mouse over #s to view details)

Detail: Head



Pushbar Operator

Duratherm proprietary pushbar comprised of oxidized bronze alloy components and a solid brass bar, copper plated and oxidized to match bronze. The sill-mounted pushbar operator is designed to be manually operated for the entire length and to hold the sash at intermediate points. Available in one piece or hinged at mid-point.
Finishes: Oil-rubbed Bronze (US10B), Lacquered Red Bronze (US20A), White Bronze (US26D).
Egress: Available as quick-release pin at sash connection.

Roto-Gear Operator

Truth Maxim® stainless steel or EntryGard® steel roto gear operator with hardened steel drive worm and plastic slider for smooth operation. Cover and crank handle in high pressure die-cast zinc.
Finishes: Oil-rubbed Bronze (US10B), Satin Nickel (US15).
Egress: Available as quick-release lever at sash connection.

Sash Locks

Oxidized bronze alloy latches ensure positive, uniform locking action.
Finishes: Oil-rubbed Bronze (US10B), Lacquered Red Bronze (US20A), White Bronze (US26D).


Heavy duty extension hinges, solid brass or zinc chromate coated steel. Hinges are designed to help the operator hold the sash in open positions, and to permit ready removal and replacement of the sash. Truth heavy duty 4-bar stainless steel hinges are available for appropriate-sized units. Solid brass 4" five-knuckle flush ball-bearing butt hinges available for egress units.

Optional Hardware

Custodial locks, sash restrictors, electric or manual remote operators, adjustable friction stays.

Insect Screens

1" x 1/4" tubular extruded frames in anodized bronze, mill finish aluminum or custom color painted aluminum. Mesh of 18 x 16 screen cloth held with vinyl spline, available in charcoal finished aluminum, mill finish aluminum, stainless steel or bright brass. Maximum width of screen mesh is 72". Wood-framed screens are available.


All glazing is per project specifications. Duratherm can accommodate most configurations and make-ups from 1/8" single glazed to a maximum of 1 3/4" security glass. Refer to the Glass and Glazing Guide in the Introduction of this binder.
Clear glass opening: Unit height minus 7 3/8", unit width minus 7".


Continuous extruded silicone flap gasket set in rebate around the perimeter of the sash. Engaging the sash locks compresses the weather-strip to ensure a tight seal.


The minimums and maximums shown are intended as guidelines. For applications that exceed these ranges, please contact the factory for assistance.


Minimum: 18”
Maximum: 36"


Minimum: 18”
Maximum: 84"

To ensure smooth and troublefree operation over time:
At maximum width of: 36", limit height to: 60"
At maximum height of: 84", limit width to: 28"


Based on:
20" clear width
24" clear height
5.7 sq ft clear opening
Minimum unit width: 28"
Minimum unit height: 30"

To meet egress requirements:
At minimum unit width of: 28", height must be at least: 48"
At minimum unit height of: 30", width must be at least: 36"

Frame Depths

Standard: 6 1/4”
Minimum*: 5 1/2”
Maximum: 10”

(*Contact factory for frame depths less than 6¼")




Static Air Infiltration:
ASTM E283 cfm/ft2 @ 1.57 psf

Allowed 0.30
Test Result 0.008

Water Infiltration:
ASTM E547-cyclic ASTM E331-static at 8 psf

Allowed 0.0
Test Result 0.0

Load Deflection:
ASTM E330 10 sec at +60 and -60 psf


Sash Torsion:
AAMA/WDMA/CSA 101 / I.S.2 / A440


Vertical Deflection:
AAMA/WDMA/CSA 101 / I.S.2 / A440


Forced Entry:


Thermal Transmission


Center of Glass:
ASTM C-236 U-value using Viracon VE1-2M Low E glass and Lawrence Berkeley Laboratories Winow 5.2 analysis program.

1": 0.29
with Argon: 0.24

Total Unit:

1": 0.35
with Argon: 0.31

Hurricane Impact


Large Missile Impact and Cyclical Air Pressure:
- ASTM E1996-05, ASTM E1886-05
- Tested at 42 psf
- Wind Zone 3, not including Dade County, FL
- Missile Level D

Note: Contact factory for size limitations
and detail modification required for
hurricane certified units.