Although most modern motor cars have a hard top roof, when the automobile was first developed, they were open. The hard top car was only introduced around the time of the First World War. Many of the hard top roofs were detachable in the early years, being connected to the car by being bolted onto the body.
Over the years, as fully closed bodies became the most popular choice, the central roof support post was removed to give the car a more open aspect and permanently attached hard top roof cars became the norm.
Although the vast majority of hard top roofs are permanently attached, there are still some makers that produce removable hard tops and, of course, there is a range of convertible cars where the hard top roof is retractable. When required, the roof of the car is retracted into the vehicle’s boot.
For those who do not want a convertible car but would like the benefit of fresh air and sunshine, a useful compromise is a sun roof. A sun roof can also be retractable and is cut into the vehicle’s roof to offer some of the benefits of a convertible hard top roof without the additional expense and maintenance associated with a hard top convertible.