FGIA's newly released AAMA 950-25 specification gives manufacturers, architects, and code officials a consistent way to evaluate windows with Window Opening Control Devices—closing a long-standing gap between ASTM F2090 hardware testing and real-world window assemblies.
A quiet spec change with loud code implications
The Fenestration and Glazing Industry Alliance's August analysis has put a spotlight on AAMA 950-25, a specification that many architects and glaziers have only recently started seeing referenced in submittal packages. It doesn't get the same attention as a new IECC cycle or a curtain wall thermal benchmark, but for anyone specifying operable windows in residential, hospitality, healthcare, or multifamily projects, this one belongs on the radar.
To provide greater understanding and consistency in how WOCDs are installed on windows, FGIA offers a specification for manufacturers to help guide their proper placement—AAMA 950-25, Specification for Window Opening Control Devices (WOCDs) Installed on Operable Windows, which provides a method for evaluating an operable window with an installed WOCD. In plain terms: the industry now has a repeatable test method that treats the window and the fall-prevention device as a single assembly, not two separate products.
Why this matters now
Window Opening Control Devices aren't new. WOCDs were introduced as a window fall prevention device starting with the 2008 version of the ASTM International F2090 standard, and the International Code Council first referenced ASTM F2090-08 in the 2012 International Residential Code and International Building Code, which established when WOCDs were required to be installed on operable windows.
What has been missing—until now—is a clean way to certify that a specific window plus a specific WOCD, installed together, actually behaves the way the code assumes it does. AAMA 950 provides information to evaluate factory-installed WOCDs, as well as those specified by the window manufacturer as a field installed kit to add a WOCD to a window after it has left the factory.
That scope matters. The new specification evaluates factory-installed WOCDs or those specified by the window manufacturer as a field installed kit—aftermarket WOCDs sold or installed on a window without the knowledge of, involvement from, or testing by the window manufacturer are outside the scope of AAMA 950. For specifiers, that draws a bright line between an engineered, tested assembly and a hardware-store retrofit.
What's actually inside the document
The AAMA 950 specification includes a list of referenced documents, requirements for test specimens, a qualification of alternate constructions, information about test procedures, the pass/fail criteria, and what is needed for inclusion in the final test report.
A few things worth flagging for the spec sheet:
- Qualification of alternate constructions. Manufacturers won't need to retest every SKU. If a window line has been tested with a WOCD, closely related configurations can be qualified without a full new test series—provided the manufacturer documents it correctly.
- Test-report requirements. Expect submittal reviews to start asking for AAMA 950-25 reports alongside the NAFS label, especially on projects where the AHJ is actively enforcing the F2090 trigger heights.
- Referenced documents. The specification references ASTM F2090, Standard Specification for Window Fall Prevention Devices with Emergency Escape (Egress) Release Mechanisms, which defines performance, safety labeling, and installation requirements. AAMA 950-25 doesn't replace F2090—it complements it at the assembly level.
The safety and liability case
FGIA Technical Manager Jason Seals notes that WOCDs are intended to help support window safety, and when properly designed, tested, specified and installed, WOCDs can help prevent or reduce accidental falls through open windows by young children while allowing the ability to open the window fully as may be needed to exit in the event of an emergency.
That dual requirement—child-fall prevention and emergency egress—is what makes WOCD design tricky and why an assembly-level test method has real value. A device that passes F2090 in isolation can still perform differently when mounted on a specific sash geometry, hardware set, or balance system.
Practical implications
- Architects: On K–12, multifamily above the third floor, hospitality, and healthcare projects, consider calling out AAMA 950-25 compliance in Division 08 alongside NAFS-26 performance grades. It closes an ambiguity that has historically been left to the contractor.
- General contractors and glazing subs: If a project spec references F2090 or the IBC/IRC WOCD provisions, ask the window manufacturer for their AAMA 950-25 test report—not just an F2090 hardware cert.
- Manufacturers: Factory-installed and manufacturer-specified field kits are now the defensible position. Aftermarket-only strategies fall outside the standard's scope and could become harder to defend in code review or litigation.
- Owners and operators: For portfolios with legacy windows, a manufacturer-specified field-installed kit tested under AAMA 950 is now the cleaner retrofit path.
The document is available through the FGIA online store. It's a small spec-sheet line item with outsized consequences for how operable window safety gets documented on the next generation of code-driven projects.