May 24

Building Trust: Effective Window Leak Testing


BEPG was obtained by Findorff construction company to assist in providing functional performance testing for recently installed and waterproofed windows of a new office building located just southwest of the City of Madison, Wisconsin.

The new facility was constructed with high end materials to include the exterior air barrier, high-end residential windows, and window flashing membrane. BEPG personnel conducted both air infiltration and water penetration testing in accordance with ASTM Standards E783 and E1105 for field testing. One of the windows was located just above ground level and the other was on the third floor.

BEPG’s engagement included reviewing product data sheets from the manufacturer, window section details, and shop drawing submittals to ensure the windows were installed according to contract documents, and the windows were tested at the proper pressures to meet the project requirements.

Services Provided

Functional Performance Testing

  • Window Leak Testing

The Importance of Window Leak Testing During Construction

Functional performance testing for window leaks during construction is crucial for ensuring the longevity and functionality of a building’s components. In this project, BEPG’s engagement confirmed installations adhered to contract specifications and met project requirements under the correct pressures.


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