AAMA 501.2 Field Check for Water Leaks in Installed Glazing and Curtain Wall

AAMA 501.2 is a field procedure for finding water leaks in installed fixed glazing systems, and itmad provides the check for installed glazing and curtain wall. A calibrated nozzle directs a controlled water stream at the exterior joints while an observer watches the interior for penetration, so leaks in glazing seals and frame joints are located on site. itmad operates across the Middle East, Asia and Europe. Last reviewed: October 2026.

What the field check covers

The procedure applies to sealed, non-operable assemblies only: fixed glazing, curtain wall, sloped glazing and storefront. It is not used on operable windows or doors, where the drainage design means that the test would not give a meaningful result.

The check locates defects in installation and sealing. It is a diagnostic tool and not a certification: passing it confirms that no leakage was observed at the joints tested, and it does not certify the product.

How it is performed

A calibrated spray nozzle is held at the specified distance from the joint and traversed at the specified rate, applying water at the pressure that the procedure sets. Each section of joint is tested in turn while an observer monitors the interior face for water ingress. Where leakage is found, testing continues in segments to isolate the point of entry, so the report identifies the defective joint and does not simply record a failure.

Standards applied

AAMA 501.2 is the field check of water penetration through installed fixed glazing. ASTM E1105 covers the field determination of water penetration under uniform or cyclic static air pressure, where a pressure-differential test is required, AAMA 502 covers field testing of newly installed fenestration products, and AAMA 503 covers field testing of newly installed storefronts, curtain walls and sloped glazing.

When it is used

Typical occasions are commissioning of a newly installed facade before handover; investigating reported water ingress in an occupied building; verifying remedial sealing work after a defect has been repaired; and quality assurance sampling during phased curtain wall installation. Site attendance is scheduled to suit facade access.

What the client receives

A test report that identifies each joint or area tested, with the location of any water penetration observed and a photographic record. The report states the test conditions, the nozzle calibration and the procedure followed, and gives a statement of the result against the criteria of the applicable standard.

Frequently asked questions

What is the AAMA 501.2 field check?

A field procedure for finding water leaks in installed fixed glazing systems. A calibrated nozzle directs a controlled water stream at the exterior joints while an observer watches the interior for penetration.

Which assemblies can it be used on?

Sealed, non-operable assemblies only: fixed glazing, curtain wall, sloped glazing and storefront. It is not used on operable windows or doors, where the drainage design would make the result meaningless.

Does passing the check certify the glazing?

No. It is a diagnostic tool and not a certification: passing it confirms only that no leakage was observed at the joints tested, and it does not certify the product.

How is the leak located?

Where leakage is found, testing continues in segments to isolate the point of entry. The report therefore identifies the defective joint and not merely a failure.

Which other standards are related?

ASTM E1105 for a pressure-differential water penetration test, AAMA 502 for newly installed fenestration products, and AAMA 503 for newly installed storefronts, curtain walls and sloped glazing. Each addresses installed systems rather than products.

When is the check used?

At commissioning before handover, when water ingress is reported in an occupied building, to verify remedial sealing, and for quality assurance sampling during phased curtain wall installation. Site attendance is scheduled to suit facade access.