Why Windows Leak

The number one cause of water intrusion window leaks in buildings is incorrect window installation. As the popularity of using windows with nailing fins for both new construction and replacement projects grows, design professionals need to understand how these types of windows are correctly specified, installed, and tested. Generally, the windows themselves perform well, but problems can arise when the contractor puts the window in the hole and seals the window in place.

“Why Windows Leak” reviews the industry standards of window installation and provides step-by-step instruction of the installation process. While designers and contractors do have options based on their personal preferences and project scope, this article focuses on the most commonly used installation method.

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