For replacing the glass, it has to be figured first how it will be taken out. Even though it is shattered into countless pieces, the glass would have to be removed from the edges before installing a new one. For a door glass, the door panel has to be removed to access the mechanism that moves the window up and down. The glass is attached below. The windshield replacement and rear window glass requires the trim and the rubber gasket to be removed. The rubber gasket has to be replaced with a new one as the new one is installed. The car manual will be of help for removing and replacing the glass.
If the crack looks exactly the same when completed, it's very likely the technician didn't inject the resin properly. A properly completed repair with cause each area of the damage to disappear from at least from one angle of vision (ex: looking from one side, looking from below, looking from above, etc.).
Why do you think there is windshield repair? You got it, cost. Some insurance companies want you to repair rather than replace because of cost. They save a fortune if you repair your windshield. Also, you need to check with your state as to what is legal as far as windshield repair all states have different laws regarding this issue.
Caring for my customers required getting in my car and driving there. I spent outrageous amounts on gas and too much time getting to my customers' homes. I also had to carry all of my tools with fix auto glass repair me from operating systems to virus removal software. An entire bag was dedicated to all of my software tools.
Once you have figured out that the crack on your windshield can be repaired, you will need a good repair kit. You can get one from your local auto parts shop or online auto parts retailers. Usually, rockchip repair kits come with an applicator or injector, an adhesive curing film, a suction cup (which serves as the base or stabilizer), and a tube of liquid resin.
In addition, a solid core fire rated door is required between the living space and the attached garage. I will elaborate more on the fire door requirements below.
Go online and check the various repair shops in your area. Read reviews and compare pricing charts. Once you've found your shop, give them a call and set up your appointment. Success is just around the corner.