Cut Sheet & Rough Opening Details

Rough Opening Details

Steel Casement Window

Rough Opening Details for Casement Windows

Steel Dual Single Casement Windows with Middle Fixed Panel

Steel Dual Single Casement Window with Fixed Panel and Thermal Break Cut Sheet Side View
Steel Dual Single Casement Window with Fixed Panel and Thermal Break Cut Sheet Top View

Specs & Materials

Frame & Jamb

These exterior steel dual single casement windows with fixed panel and thermal break are pre-hung and include the windows and fully assembled frame. The jamb size is measured at 2.5” deep (net size) and made from Ottostumm cold rolled solid steel.

Please note that, for weather sealing purposes, all casement windows with thermal break are made as outswing units, meaning the operable panel will swing to the outside of your home.

Awning Window with Thermal Break Jamb Detail

Casement Window Jamb Detail

Drip Edge

These exterior dual steel single casement windows with fixed panel and thermal break feature a drip edge directly above the operable window panels. This drip edge serves as an additional barrier, preventing descending exterior elements from entering your space between the frame and operable panel itself, while still allowing the casement window to operate without obstruction.

Macro Photo of a Drip Edge

Hinges

These exterior steel dual single casement windows with fixed panel and thermal break come standard with modern bullet hinges. The frame will have the bottom portion of the hinges welded on (Hinge and male pin). The top receiving portion of the hinge will be welded onto each window leaf, and include a screwed in grease fitting, allowing you to maintain and grease the hinges regularly via a standard grease gun. 

One copper crush washer per hinge is included and required prior to hanging the window onto the frame. These washers protect the hinges by introducing a softer copper metal between the 2 hinge components in order to absorb the friction and allow the doors to swing smoothly. This hinge system is far superior to ball bearing systems, as the bearings are made of stainless steel, which is a harder metal inside a steel barrel, causing wear to both components and sagging over time.

Closeup photo of a casement window hinge

Non Thermal Break Reference Photo

Hardware

Each of these exterior steel dual single casement windows with fixed panel and thermal break include both the locking handles as well as the window stays, which work in conjunction to operate each casement window.

The locking handles include brass wedges attached to the frame of each window in which the handles will lock onto. The window stays are attached to the bottom of the window and include  butterfly thumb turns to secure the stays and windows in their desired position.

Please note, single casement windows taller than 48” will include single handles that operate multiple locking points along the frame.

Locking Handle for single casement windows 48” and shorter

Casement Window Point Hardware

Locking Handle for single casement windows 48” - 72” tall

Casement Window Stays Closed
Casement Window Stays Open

Weather Stripping

These steel exterior dual single casement windows with fixed panel and thermal break come standard with pre-installed weather stripping around the entire perimeter of the casement window panels as well as the frame. This creates a full seal and acts as a barrier from outdoor elements, helping to prevent cold or hot air from leaking out of the home, resulting in a much more energy efficient product.

Nailer Fin

These steel exterior dual single casement windows with fixed panel and thermal break feature a welded 2.8” nailer fin around the frame of the window, and is designed to be installed from the exterior of your space. This nailer fin is inset to allow for a .9” of finish work on the exterior of your home, and includes pre-drilled holes around the entire face of the fin.

Macro photo of window nailer fin

Metals

Steel windows offer many more enhanced security features when compared to their wood, fiberglass, vinyl, or aluminum counterparts. These steel exterior dual single casement windows with fixed panel and thermal break are made with thermally broken Ottostumm cold rolled solid steel, drawing inspiration from 20th century design characteristics, with a modern twist. Thermal break models use a thermal barrier to interrupt the transfer of cold, preventing the cold air from penetrating to the interior of your home. This Ottostumm thermal break material, crafted from an advanced high-density polyurethane, provides the ability to satisfy the stringent regulations that many builds require with regards to energy efficiency.

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FAQs

How thick are your exterior steel dual single casement windows with fixed panel and  thermal break jambs? 

These exterior steel dual single casement windows with fixed panel and thermal break jambs come standard at 2.5” thick (net size).

Is the jamb the same thing as the frame? 

The jamb refers to the vertical components of the overall door frame. The jamb size refers to the thickness of those vertical components.

How does the frame mount to the wall? 

These steel exterior dual single casement windows with fixed panel and thermal break feature a welded 2.8” nailer fin around the frame of the window, and is designed to be installed from the exterior of your space. This nailer fin is inset to allow for a .9” of finish work on the exterior of your home, and includes pre-drilled holes around the entire face of the fin.

Is the jamb included with the window?

Yes, the jamb is a component of the frame, which is made specifically for the window that it is packaged with.

Is the jamb/frame galvanized or zinc coated?

Yes, these exterior steel dual single casement windows with fixed panel and thermal break jambs and frames are galvanized and zinc coated. This combination helps prevent finish issues when exposed to damp or moist conditions.