Impact glass consists of a robust and laminated interlayer bonded between two panes of annealed, heat-strengthened, or tempered glass. When struck by a forceful object, the glass resists shattering. When an object strikes impact glass, it may crack or shatter, but stays together as one piece to prevent outside elements intruding into the home. Windows and doors staying intact during a hurricane are crucial if air enters a home, it causes a pressure build-up and can blow doors and windows out, and lift the roof off your home.