[Alhaitham waits until the signal to move, and then he starts forward. The pace is slow enough that it's the toe of his boot that hits the barrier first and bring him to a stop. Alhaitham presses his hand to it, and then slides around its perimeter.]

It looks like it covers most of the area. [Not everything but enough that most people would be under its protection if something did happen.] I don't have any way to test its response to magic, but I assume it will withstand that as much as a physical blow?