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SCOPE AND PURPOSE
The purpose and objective of this methodology document is to provide a Quality Assurance (QA) and Diagnostic Field Water Check (DFWC) methodology for the following existing:
- Storefronts
- Curtain walls
- Sloped glazing systems
This methodology procedure highlighted in this document is not concerned to test the rated or specified water performance representative of a wind-driven rain event. American Architectural Manufacturers Association (AAMA-503) - Voluntary Specification for Field Testing of Newly Installed Storefronts, Curtain Walls, and Sloped Glazing Systems) is the proper test method for field testing of storefronts, curtain walls, and slope glazing for air leakage resistance and water penetration resistance performance.
Remember:
This field check methodology and or procedure is not fit and intended for the doors and windows that can be opened and closed. On the contrary side, AAMA 502-02 is an air leakage resistance and water penetration resistance. Field testing proper test method.
This field check procedure is intended to evaluate the following:
- Hose Joints
- Gasket
- Sealant details in the glazing which are designed to remain permanently closed and watertight.
The basic units of measure in this methodology and or procedure document are metrics.
PREPARATION OF TEST AREA
All framing and/or units shall be installed on the lower two typical floors of the building for curtain wall testing and on the lowest typical floor for a storefront or sloped glazing system testing.
The testing area shall be completely glazed to provide an accomplished installation.
All of this work should be done in strict accordance with approved shop drawings and Job specifications.
The architect and/or owners appointed and or assigned representative shall assign the area of the accomplished part to be tested accordingly.
The test area shall be represented alive ample of typical construction and shall have no outstanding punch list items or other visible defects.
Info test area and/or location has been identified, the persons doing the test shall select an area. This area shall be selected to provide representative performance data, usually a minimum of 9.3 m2 (100 ft.).
The area to be tested shall include, pen meter caulking, typical splices, frame intersections, and, if applicable, at least 2 entire vision lights and 2 entire spandrel lights containing an Intermediate Vertical Member (IVM) and an Intermediate Horizontal Member (IHM). All operable components within the test area shall be isolated and exempt from the test procedure.
Remember:
Testing shall be performed as soon as possible after the fenestration product is installed. Before the installation of drywall or other internal or interior finish wall materials. If internal wall materials have been installed they shall be removed at the test area to enable visual access to check appropriately for water penetration, or alternative means of visual access shall be provided accordingly. If removal of internal finish work is needed the sponsor of the test is accountable and responsible for the cost of removal and repairs work.
APPARATUS
The test will use a Type B-25, #6.030 brass nozzle with a 112" FPT.
The nozzle shall be connected to a hose [19 mm (314 in) diameter is suggested) and shall be provided with a control valve and a pressure gauge between the valve and the nozzle.
The water pressure to the nozzle shall be adjusted 10 to produce 205 to 240 kPa (30 to 35 psi) at the nozzle inlet.
The pressure gauge shall be calibrated at a maximum of 6-month intervals. Record of calibration certificate shall be made available upon request
Remember:
This test method may be conducted at pressures lower than 205 kPa (30psi) providing that the reason (i.e. not practical at a multistory building location} for not achieving this pressure is 1) acceptable to the specifier, 2) the pressure is not lower titan 170 kPa (25 psi) and 3) the reason and the actual pressure are so noted in the test report as an exception to the method.
PROCEDURE
The designated test area shall be categorized into and evaluated in 1.5 meters (5-foot) sections of the framing and joint. The nozzle shall be held at 305 millimeters (1 foot.) ±25 millimeters (1 inch) from the location under test. Every 1.5-meter portion of the water test area shall be appropriately and carefully evaluated for at least 5 minutes by slowly moving the nozzle back and forth over the test section area while maintaining the nozzle crosswise to the plane of the wall.
Remember:
It is recommended that a gauge be attached to the end of the nozzle to ensure that tile specified distance from the joint under test is maintained.
Working from the exterior, the wall test section shall be selectively wetted progressing from the lowest horizontal framing member, then the adjacent framing intersections, then the adjacent vertical framing members, etc.
Remember:
For this water leakage field check water leakage is defined as any under-controlled water that appears on any normally exposed inferior surfaces, that is not controlled or drained back to the exterior, or that can cause damage to adjacent materials or finishes. Water stored or accumulated within drained flashings, gutters, and sills should not be thought to be a water leakage issue. The collection of up to 15 millimeters (112 oz.) of water in a five-minute test period on top of an interior stop or stool integral with the system shall not be considered water leakage.
If no water leakage occurs during the five-minute test, the next 1.5 m (5 ft.) of framing shall wait for five minutes, and testing continued in this manner until the entire last area is tested.
If water leakage starts and the source and origin of the water leakage cannot be detected, the below sequence shall be practiced:
After allowing the wall to dry completely and working downward from the top of the area to be checked, all joints, gaskets, and framing within this area shall be completely and tightly covered, on the outdoor side. With a waterproof adhesive masking tape. If required and mandatory, apply a small amount of sealant where the tape wraps around the framing corners and joints to ensure the masking is complete and waterproof.
Starting at the bottom of the prepared area, the masking tape shall be removed from the lowest horizontal framing for a distance of not more than 1524 millimeters (5 feet.) from one end of the frame. Including the joint intersection or corner at the end. This exposed length shall be subjected to the nozzle spray.
If no water leakage occurs during the five-minute test period. This length of framing shall be considered satisfactory and shall remain uncovered. If leakage has occurred at any point, the framing shall be replaced at such points to prevent further leakage of these points during the subsequent checking of joints and framing adjacent to or above them.
This process shall then be repeated on all framing, gaskets, and joint intersections within the designated area, using increments of exposed framing length not exceeding 1524 millimeters (5 feet) and always working upward on the wall.
Remember:
In some cases, unforeseen delays or other causes. More than one Working day may be required to complete. Appropriately and carefully examine the designated area, necessitating that some or all of the masking tape be left in place overnight. This tape should be removed to finish metal or glass surfaces any longer shall necessary, especially where subjected to strong sunlight, as this may make its removal difficult. It is the responsibility of the party contracting for the test properly clean the residual adhesive or sealant resulting from the testing.
Testing shall be performed by an AAMA-accredited independent testing agency.
Specifier Keynote:
AAMA-accredited laboratories are needed to comply with AAMA 204-98 "technical Guidelines for AAMA Accreditation of independent Laboratories carrying out On-Site Testing (OST) of Fenestration/Aperture Products " The requirement of AAMA accreditation accessories particularly the Laboratory has the staff. Training, experience. And calibrated equipment to properly perform field resting.
REMEDIAL WORK AND RE-CHECKING
Wherever water leakage has been detected or seen, the framing shall be made watertight in a manner acceptable to the client's representative. Rectification work including the use of curing-type compounds shall be permitted to set prior to it being re-checked and re-evaluated for any leakage.
After all mandatory rectification work has been accomplished and the required curing time, if any, has expired, all repaired and or maintained framing sections/areas shall again be properly and closely examined. If there is still any leakage, further appropriate rectification initiatives shall be practiced and proper and close checking shall be repeated until all framing in the designated area is found to be satisfactory with no leakage.
TEST REPORT
The test report shall include the following general information: testing agency, date and time of testing, date of report, identification, and location of the building.
The test report shall include the following information regarding the fenestration test specimen: Manufacturer, model, dimensions, materials, etc.; identification and locations of fenestration product (s) on the building; physical condition. Of fenestration products; description of any modifications made to the fenestration products.
The test report shall include a statement regarding sampling procedures.
The test report shall include all test results (and all retests) and a record of all points of water leakage.
The test report shall include a compliance statement indicating that the tests were conducted in accordance with this method or completely describe any deviation.
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