Impact Windows and Doors that Can Weather The Storm Better In Miami And Nearby. Excellent solutions for Hurricane Protection. At CAV Impact we sell, service and install the best impact windows and doors in Miami and its surroundings. Impact windows not only prevent the water from damaging the house, but also they control the increasing air pressure that actually results in the collapse of walls and blowing of roofs. These windows are intact to prevent damage through a storm. We have a wide variety of different impact doors styles which add a perfect addition to you home or business in Miami and surroundings.