Why knowing the type of car windows you have could save your life

There are two main types of glass in a car: laminated and tempered.
3:40 | 07/17/19

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Transcript for Why knowing the type of car windows you have could save your life
consumer alert. As so many families hit the road a new report from aaa concludes that knowing your car's window type could save your life in an emergency. Here's will reeve. Reporter: Watch as a Spokane police officer repeatedly hits this window with his baton trying to save a woman from her burning car. Eventually he makes a hole large enough for an escape but why was the window so hard to crack. We got you. Reporter: There are two main types of glass in a car, laminated and tempered glass. Tempered glass fractures into small pieces in hopes of preventing serious injuries from sharp edges while laminated is two or more panes of glass joined together by a layer of plastic and is harder to break. While most are made of laminated glass government regulations allow side windows to be either. In an emergency situation like this demo, knowing which kind of glass your windows are could be the difference between life and death but it's not something many of us even think about. Do you know what type of glass that is? No, I just bought a truck and I'm driving. I really don't know. Reporter: Physiologist Dr. Gordon giesbric says laminated has some plus. That will decrease the number of people being ejected. Reporter: And some minuses. But then the other problem is if you're ever trapped and need to break a window it's very, very difficult. Reporter: "Gma" teamed up with sergeant Chris lambert to show the difference between the two glasses the we used two popular rescue tools. First up a car with tempered glass and we try the rescue me tool. Look for your target which is going to be the lower corner of the front of the window. The glass instantly shatters just like it's supposed to enabling an easy escape. And next the life hammer. We're alive and able to get out of the car but when we switch to the car with the laminated glass it's a different story. I go for the same corner. None of these tools work on laminated glass. No, they don't. Life hammer did not mention on its website its product does not work on laminated glass, but after "Gma" reached out they added it breaks nonlaminated car glass. Rescue me's website says it only works on tempered glass. The device will work on tempered only not laminated. Important to research what type of glass is in each window so you will know the proper protocol to escape. To show us how to rescue someone with laminated the fire department jumps in with this special saw. But sergeant lambert points out even if your car Haslam natured glass in the front side windows many times the back passenger and rear windows have tempered glass where these devices will work. But experts say the first thing to do is unbuckle your seat belt and try to roll down the window. So how do you know what type of windows you have? In the corner of the window there is a label. If you read it it says that it is laminated. Reporter: Should the type of glass a car has influence whether to purchase it? It shouldn't influence that decision to make the purchase. What it should influence is the way you have established your emergency action plan if the need arises to exit that vehicle. Reporter: For "Good morning America," will reeve, ABC news, Indianapolis. Had it comes to checking what type of windows you have if you don't see the label, go to our website, goodmorningamerica.com for aaa's full breakdown by car modelment meantime, let's C

This transcript has been automatically generated and may not be 100% accurate.

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