What makes a windshield so special?
Windshields are made with two pieces of float glass with a plastic laminate sheet sandwiched between them. Windshields are made in such a way for safety. Windshields that hold an ASA-1 rating can and must withstand certain impact ratings. So, if a pebble were to hit your windshield, even at high speeds, it won’t penetrate through the glass. That’s not to say that the glass is not damaged, but the sheet of plastic laminate is protecting the inside piece of float glass from becoming damaged. So, all you’re left with is an unsightly crack on the outside piece of glass.