What is the first step to take when installing windows?

The first step to take when installing windows is to install flashing around the opening. This is crucial because flashing serves as a protective barrier that directs water away from the window assembly, preventing potential leaks and water damage. Proper flashing installation ensures that any water that may penetrate the surrounding materials will be guided away, thereby maintaining the integrity of the window and the overall structure.

Before installing the window itself, ensuring that the rough opening is properly flashed not only facilitates an efficient installation process but also adds long-term durability and resistance against moisture-related issues. This practice aligns with industry standards for building codes and best construction practices.

While removing the blocking, painting with primer, or removing the sash may seem necessary during window installation, these steps are either preparatory actions that follow the flashing installation or not essential priorities to address first. The emphasis on flashing underscores its role as a fundamental protective measure in window installation, establishing a solid foundation for the work that follows.