Why do rear windshields have lines

Other than that, how this particular pane of auto glass is made, functions, and feature, set it apart from the front windshield. Unlike the front windshield, the glass for the back windshield is made in the same way that auto glass is made for the side window, vent window, or quarter glass panes: tempered glass.

The back car window glass is strengthened by thermal or chemical treatments so that it can withstand blunt force, but will shatter into tiny, granular chunks of glass instead of shards. The rear windshield comes in all shapes and sizes, depending on what kind of vehicle you are driving. Defroster in your back window: Have you ever wondered how those little lines on your rear windshield defrost so quickly and easily? So what are these lines made of anyways?

Technically they are a high concentration of metal most likely not led with the new regulations and adhesive. Alright, we know what they are but why the back and not the front? Actually, there are many reasons they primarily exist on your rear windshield. Probably the main reason only the back windshield has them is that the front has air blowers to defrost while the back rarely does.

The front blowers are also much cheaper than the metallic lines as heating ducts will always be incorporated into the car. This is why it costs so much more to replace a rear windshield than a front one.

The factory has to use more resource and must conduct more tests to make sure the defroster lines work. Another major reason for no lines on the front shield is visibility requirements set in place by the Department of Transportation of each state.

Mock-up for sticker or decals. So many cars have a rear windshield with lines. But what is really the purpose of those lines? The lines on a rear windshield can be felt when running a hand or an ice scraper along the glass. The lines have a purpose, and it has something to do with the temperature that a car is being subjected to.

Because the glass of a windshield can be obscured by condensation, the lines on it acts as defrosters. The lines are actually small wires that are built into the glass to quickly defrost a rear windshield. Rear windshield defrosters, also known as the lines or wires in the glass, are thermal and integrated into the rear defroster system to ensure visibility while driving in all weather conditions.

The defroster system works in tandem with the front windshield defroster and runs a small electric current to heat the rear windshield glass, which is how fog and frost are managed. When power is applied, these conductors, or lines, heat up, thawing ice and evaporating condensation from the glass.

The back glass in certain models may include additional enhancements such as rear windshield wipers and sliding panes or panes that open outward allowing for increased circulation, depending on the type of vehicle you drive. Getting the Right Replacement Back Glass When working on windshield repairs and replacements, expert glass technicians must take heed of the specific glass needed for your car to function properly.