Major thing that needs to be considered is the location and size of the damage. If damage is at the edge of the windshield then it will spread fast and will destroy the integrity of the glass. If any edge damage is found then windshield chip repair it soon. It will save the life of your windshield.
Automobiles are made so that a cracked windshield can be replaced; they are not made to be repaired. To my knowledge, manufacturers do not recommend or promote repairing windshields they recommend replacing them. A windshield is a structural part of the body and is in place for safety reasons. You shouldn't mess with the overall safety of the car by repairing a glass that is vital to safety during a rollover or accident.
If the chip is smaller than a quarter and the crack is less than 12 inches long, they would most likely provide service to you at the convenience of your home. The repair kit they will be bringing will contain several materials, tools and equipment. This would include a windshield repair bridge that is self-leveling and is able to reach anywhere on the windshield together with the injector. A crack expander that slides easily and reaches low on the windshield. An A.C. powered ultraviolet curing lamp and a 15 watt, 22 inches bulb for curing long cracks. A drill if the chip needs to be cleaned. A curing film that enhances the ultraviolet rays for faster and complete curing, a UV protected syringes designed to protect the resin from the sun's ultra violet rays, the resin and some other stuff.
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.
After our job was done, I sat on the back porch with a cold drink to rest. I noticed something interesting. A pair of robins appeared to be looking over the damage of the tree. The bright red-breasted male surveyed the grounds where chunks of bark and leaves rested. Then he flew to the fence near the tree appearing to investigate the large crack in the trunk. The female robin began to pick up sticks and leaves off the ground. She flew into a nearby tree where she was rebuilding a nest.
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.
Windshield repair techs come and go on a daily basis. The majority struggle to survive. Most fail. It's not that they're not good at what they do, it's not that they don't have the skills, it's not that they're not willing to work hard, it's their lack of MARKETING Training. That's the bottom line: It all comes down to proper marketing strategies.