If you own a vehicle with glass that has small cracks, chips or other issues, you may need to invest in the services for windscreen replacement Perth companies provide. Although it is generally cheapest to have damaged auto glass fixed, there are some instances in which the structural integrity of individual panes has been compromised beyond the point of repair. A good way of determining whether or not you should fix or replace your auto glass is by measuring the damage with your hand. If a crack is longer than the length of your palm, then the windscreen should be replaced. If a rock chip is wider than your palm, the glass should also be replaced. Fortunately, if you catch and resolve these issues before they have the chance to expand, you can limit their impact and your overall vehicle maintenance costs.