1. Weight: Double glazing would add significant weight to a car, which would reduce fuel efficiency and performance.
2. Cost: Double glazing is more expensive than single glazing, and car manufacturers are always looking for ways to reduce costs.
3. Space: Double glazing would take up more space inside a car, which could reduce passenger and cargo space.
4. Safety: Double glazing could be more dangerous than single glazing in the event of an accident, as the shattered glass could cause more injuries.
However, there are some cars that do use double glazing, such as the Rolls-Royce Phantom and the Mercedes-Maybach S-Class. These cars are typically very expensive and have a high level of luxury and comfort.
In addition to these reasons, double glazing is also not necessary for cars in the same way that it is for buildings. Cars are already relatively well-insulated, and the addition of double glazing would not make a significant difference in terms of energy efficiency or noise reduction.
Overall, the benefits of double glazing in cars do not outweigh the drawbacks, which is why it is not commonly used.
