AAMA 501.2:  Quality Assurance and Diagnostic Water Leakage Field Check of Installed Storefronts, Curtain Walls, and Sloped Glazing Systems  

Cx Associates performs AAMA 501.2 field testing. We've performed building enclosure commissioning and AAMA 501.2 field testing on commercial, industrial, institutional, multifamily, and residential projects across Vermont and the Northeast. Our team includes experts with deep familiarity in building code and enclosure standards.

AAMA 501.2 At a Glance

What it tests

Qualitative check for water leakage through fixed glazing joints of installed storefronts, curtain walls, and sloped glazing

Applicable to

Installed storefronts, curtain walls, sloped glazing systems — new or existing

Referenced by

Project specifications, Building enclosure forensic investigations

New vs Existing

Well suited to both; particularly valuable for existing building diagnostics beyond just fenestration systems

What is AAMA 501.2?

AAMA 501.2 is a qualitative test method for identifying water leakage through installed storefronts, curtain walls, and sloped glazing systems.

The test uses a calibrated nozzle to apply a controlled stream of water to fixed glazing joints, of the fenestration system, working from lowest point to highest point, while an observer on the interior monitors for any water that penetrates to the room side. This test does not utilize a chamber to simulate a wind event and is therefore a good fit in new construction glazing at locations where ASTM E1105 or AAMA 503 cannot be easily accommodated. For example, at corner systems and spandrel glazing. Operable joints are typically excluded. Though commonly used in new construction, adaptations of this method are commonly applied to existing buildings, possibly coupled with blower door systems, to aid in the diagnosis of broader water infiltration mechanisms.

Scope and Application

New construction — post-installation verification or investigation of suspected leakage before turnover

New construction – where specified and/or in lieu of ASTM E1105 and AAMA 503 testing.

Existing buildings — locating sources of chronic or recurring water infiltration via fenestration or other building enclosure systems

Post-repair verification — confirming that a remediated condition no longer leaks

Forensic investigations in support of documenting information for warranty claims, insurance claims, or litigation

Storefront systems, unitized and stick-built curtain walls, and sloped glazing

Why should I consider this test?

Water infiltration through commercial glazing systems is one of the most common and contentious building envelope failure modes. Leaks often go unreported for months or years — visible interior damage may appear far from the actual entry point, and moisture may accumulate in wall cavities or slab edges long before any occupant notice. AAMA 501.2 provides an efficient, low-cost method for locating the source of leakage without the setup time and cost of a full AAMA 503 chamber test.

For building owners dealing with chronic leakage, AAMA 501.2 testing typically represents one of the first on-site steps in a diagnostic process — identifying where the problem is before determining what the fix should be. Cx Associates often pairs AAMA 501.2 field investigation with visual assessment, review of original shop drawings, and material investigation to develop a complete picture of the failure mode and an appropriate remediation strategy.

Related Testing Standards

These standards are commonly specified alongside or in place of AAMA 501.2 depending on project scope. Cx Associates performs all of the following: