you get hit by a stone and you have a nice chip in your screen. Now a lot of people think a new screen is the only option but now it is possible to repair some types of chip.There is a British Standard that now applies to windscreen repair (BS AU242A 1998).This dictates the size and shape of what can and can,t be repaired.Your screen is divided into four area,s or Zones.
Zone A - 290mm wide centered on a vertical line passing through the centre of the drivers seat and vertical lines going from top to bottom of the screen. For HGV,S and Coaches this is 350mm wide.
Zone B - The rest of the screen swept by the Drivers wiper.
Zone C - The area swept by the Passenger wiper.
Zone D - The area not swept by any wiper.
The damage which may be repaired in each zone is:-
Zone A - Damage contained within a 10mm circle.
Zone B - Damage contained within a 15mm circle.
Zone C - Damage contained within a 25mm circle.
Zone D - Damage contained within a 40mm circle.
No two repaired area,s should be closer to each other than 100mm.
MOT TEST from 1993.
A vehicle will fail the test if any single area damage is not contained within an area of 10mm diameter in zone A and 40mm in the remainder of the swept area on the rest of the windscreen.
If there is multiple damage that could impair the drivers vision in zone A or if damage interferes with the wipers cleaning the screen then this is also a fail. :x
If a continuous crack stretches from 10mm inside zone A and 30mm into the rest of the wiper swept area, this is a PASS. :-D
If a continuous crack stretches from 11mm inside zone A and 30mm into the rest of the wiper swept area, This is a FAIL. :x
If there is evidence of multiple breaks which have been repaired leaving too many dull marks in zone A and this impedes the drivers view, this is a FAIL. :x
If you have fully comp insurance then repairs are FREE
. This does not interfere with your no claims bonus. Repairs are quite simple to do. A small hole is drilled into the centre of the chip and a liquid resin is injected into the chip. This is then cured under a U.V lamp which makes the resin go hard and restores the strength back into your screen. A small grey mark is left on the surface of the screen which can sometimes be polished out.
Well I hope your not too confused after reading this, if you are wait till I write about windscreens themselves!!! :thumb:
