Glass Repair


In many cases, Glass Repair can prevent the windscreen from having to be replaced. Small chips, if ignored, can easily enlarge and become impossible to repair. Thus, it is important to act quickly.

This tutorial gives you more information about:

Repair quality

Safety – types of damage

Repair regulations


Glass Repair: Additional Knowledge

Learn everything you need to know about the subject of Glass Repair.

Depending on its size and position, a chip on your windscreen may cause distraction or even impair visibility. If ignored, small chips can enlarge and become impossible to repair. Secondary cracks can form under the combined effect of heat, moisture, frost, dirt and vibration. This may weaken the stability of the windscreen and affect the correct functioning of the airbag. Consequently, it is essential to repair the damage quickly, because any dirt or moisture that enters the chip will make it more difficult to produce a visually acceptable repair.

The right tools, experience, practical skills and sufficient time (don't rush!) are the key to ensure a successful, high-quality windscreen repair.

Depending on the geometry, size and position of the crack, it may be possible to repair the damage. Alternatively, it may be necessary to replace the entire windscreen. Stone chips can be classed as:

Easy to repair

Vehicle Glass Repair - Easy to repair chips or cracks.

a) Bull's eye
b) Fragmented break
c) Combination break

Difficult to repair

Vehicle Glass Repair - Difficult to repair chips or cracks.

d) Star break
e) Half moon
f) Bee's wing

Stone chips and cracks across the windscreen can be repaired, depending on location.

•  A repair is not allowed if the damage is directly in front of the driver – in the area known as the 'A zone'

•  Only cracks up to 10 mm in size may be repaired. This is slightly less than the size of a five-pence coin (for the UK) or a one-eurocent coin (for Germany).

• Repairs at a distance of less than 10 cm from the edge of the windscreen are not recommended.

Vehicle Glass Repair - Legal regulations of position and size of damage in cars.



'A zone' in passenger cars:
For passenger cars and other vehicles with a gross vehicle weight of up to 3.5 t.

Vehicle Glass Repair - Legal regulations of position and size of damage in trucks.

'A zone' in trucks:
C-centre, a point where the driver's seat is at the midpoint of its lengthwise adjustment range.