Why is it important to use a level when installing windows?

Using a level when installing windows is crucial for ensuring proper alignment. When a window is not level, it can lead to a range of issues such as difficulty in opening and closing, water infiltration, and problems with insulation. A proper alignment ensures that the window sits squarely within the frame, allowing for even weight distribution and enhancing the overall functionality and durability of the window.

A level helps the installer verify that the window is not only aligned horizontally but also vertically. This is essential because a misaligned window can cause gaps, leading to energy loss and compromising the structural integrity of the building. Ensuring the window is level allows for an effective seal, preventing air and moisture leaks, which are critical for maintaining the efficiency of heating and cooling systems within a structure.