Which type of windows are considered the most difficult to force?

Jalousie windows are considered the most difficult to force due to their unique construction and design. These windows feature slats, or glass louvers, that can be opened and closed by a mechanism, which provides a tight seal when closed. The slats are generally not in a single panel; instead, they are controlled by a system that can be locked in place. This design makes it challenging for firefighters and rescue personnel to gain access quickly, as each slat can be independently adjusted and may require specific tools or methods to open.

Additionally, the lock mechanism used in jalousie windows is often more secure than that of other window types, further complicating the forcible entry process. In high-stress situations, such as firefighting, having windows that are harder to access can significantly impact operational efficiency and safety, as it can prevent quick entry and extraction.

In contrast, other types of windows, such as double-hung, casement, and slider windows, typically have simpler mechanisms or layouts that allow for quicker access when necessary, making them less challenging to force in emergency situations.