Its important to note that the automobile windshield chip repair exterior trim and moldings that we can see on the outside of the glass are for looks only. The actual water seal comes from the "urethane" adhesive which is used to create the bond. Its in this urethane that the water leak is originating.

By having a look, they can decide if you need windshield auto glass replacement or whether an adhesive will do. Smaller cracks are fixed with adhesives that stick to windshields and reinforce the material. They can also let you know how long it will take to fix and how much it will cost you.
If you do decide that windshield repair is your best bet, you have a few choices. First of all, make sure you check to see if your insurance covers it. In a lot of instances it does. The problem is that many policies have a deductible that is higher than the cost of the replacement or repair job. If that is the case, you will have to pay for it yourself.
A windshield repair, when done correctly, is the safe choice. But not all damage is repairable. For as many types of debris that exist to damage your windshield, there are as many types of chips and cracks that can result. Some of the most common types of chips have been named.
Windshields, surprisingly, bear almost 70% of the roof's weight on itself. So it makes sense to keep the glass serviced and maintained. A small crack can cause an accident in the car. This is because the windshield is put under high stress when it is placed. Serious accidents can occur when driving at high speeds. Auto Glass Specialists suggest regular check up and maintenance of the windshield.
Windshield replacement can be very expensive, and you obviously want to be absolutely certain it is a necessity before doing so. If you can get by with a simple repair, go for it. If not, make sure you take your time and go with a company that will do a quality job. The windshield replacement could cost more upfront, but the long term benefits will be worth it.