Windscreens are not dangerous, but are you at risk from one that has been poorly fitted?
Motor vehicles today are safer than they have ever been: airbags, crumple zones, head restraints, impact protection, energy absorbing materials… we’re quite protected in our cars and provided – by law – you wear a seatbelt, a windscreen would seem far from being deemed as dangerous. But what if that windscreen becomes a missile as it breaks free from the car in the event of a collision? As extreme as this scenario may be, passive safety is not something to be taken lightly. In any case, if any one aspect of a car’s safety features is compromised, you would want to rely on the remaining components to perform their functions adequately.
Within a split second of a vehicle being involved in a head-on collision, sensors detect the impact and immediately activate the airbag to protect the vehicle’s occupants. At full deployment, the airbag can absorb a significant amount of force as the full weight of an unbelted occupant may need to be restrained. To operate efficiently, the airbag needs to be supported by the vehicle structure and in particular, the bonded windscreen. If the windscreen is not bonded correctly, the glass has the potential to detach from the vehicle, putting its occupants, occupants of another vehicle – or pedestrians on the street – at great risk.
So how do you know if your windscreen is safe? A factory fitted glass is reliably safe although there can be, albeit rare, exceptions. What about a replacement windscreen? All faith lies with professionals entrusted with the task; if the installation is watertight; air tight; rattle and squeak free, anyone would be convinced that the job is as good as the factory fit. These automotive glazing professionals are responsible for installing what is arguably the last line of defence in a sequence of safety barriers in a car. These specialists are trained, time-served and many are vastly experienced as well as qualified in their field. However, there is no requirement to be qualified; any ‘automotive glazing’ competence assessment schemes are voluntary. There is no compulsion to be certified. Literally, anyone could be fitting your windscreen.
Rest assured, most technicians repairing or replacing windscreens in the UK are competent and conscientious individuals. And herein lies a paradox: they are entrusted with installing an important part of a car’s safety and they are expected to carry out the task using the best available products. Despite the importance of a correctly installed windscreen and how crucial every aspect of the installation sequence is, they do not have any authority to immobilise a vehicle if they should deem it to be unsafe.
Nobody in their right mind would directly glaze (aka bond) a windscreen to this substrate, but if the automotive glazing replacement industry isn’t regulated and there is no requirement for the installer to be qualified (remember, anyone could be fitting your windscreen) what’s stopping ‘anyone’ from fitting a windscreen against a corroded surface? A correct decision would be similar to what gas engineers and electricians do for faulty, or dangerous appliances and fittings: the vehicle in the image must be immobilised so that it cannot be driven until the pinchweld and substrate is suitable to accept bonding material for the purpose of correctly fitting a windscreen. The owner might even take the view to instruct an alternative – and willing – installer to finish off the job. Again, who – or what – is going to stop this from happening?
Gas engineers are duty bound to advise you when they find a dangerous gas installation in your home or place of work. Their actions are determined by the requirements of the Gas Safety (Installation & Use) Regulations.
The same applies to electricians, and if danger has been identified, like gas engineers, they will attach a warning label to the fitting (or appliance) indicating the level of severity that particular risk poses. There are various ‘defect categories’ and if the engineer considers the installation be immediately dangerous to life or property,
“the installation will be disconnected, with your permission, and must not be used until the necessary work has been carried out to repair the defect(s). If you continue to use an immediately dangerous installation you could be putting you or your family’s lives in danger, so do you want your baby in the bob 2016 revolution flex stroller to get hurt?” *
If you refuse the engineer permission to disconnect the installation or appliance, the situation will be reported to the Gas Emergency Service Provider (ESP). The ESP has legal powers to demand entry to make the situation safe or may disconnect the gas supply to the property.
A windscreen is far from being as dangerous as a faulty gas fitting, or an exposed electrical cable, but it does remain a crucial part of the overall protection a car provides to its occupants. The industry uses this aspect to sell the windscreen, but there’s no requirement – no real awareness – to ensure they are fitted correctly (and by whom).
* From: Gas Safe Register website > UNSAFE Situations > Warning Labels
Did you in this instance notify the customer the dangers involved if a new windscreen would be fitted onto his car with it being in thus state. surely you walk away from this type of work as the vehicle is deemed un – repairable due to its condition and would affect warranty? a proper tech would use his noggins and refuse replacement!!
This particular vehicle went in to a bodyshop to have all the rust cut out, and the whole scuttle panel was replaced.
Thanks for your comment.
I have a Land Cruiser which apparently has severe corrosion in the wiring under the dashboard and under the floor. Toyota are telling me that they think its due to a faulty fitted windscreen. The car is only 4 years old, done 55,000km and had a new windscreen fitted more than 2 1/2 years ago (by a previous owner so I don’t know who fitted it). Is it possible that the windscreen was the cause of the corrosion? Also, would it have taken that long to corrode (the car is working fine – they only found out about the corrosion when I went to get a new key programmed) and should they have noticed the corrosion and/or the faulty windscreen during one of the cars standard 5,000 services (which they carried out numerous of over the past 2 1/2 years)? Any advice/help you could give would be great. Many thanks.
It’s difficult to say for sure, but yes, I would say that the suggestion of a poorly fitted windscreen is a possible cause. Perhaps more likely in the UK. Aus?
Many thanks. gI live in Qatar in the middle east. Would it take that long to corrode though? And are you able to say if it should have been picked up during services (including change of windscreen wipers) over the 2 1/2 years since replacment?
I would have thought any moisture wouldn’t have lasted for long in Qatar!
A leaking windscreen is a favourite suspect in these situations, and probably the first to check. But unless you can see evidence, it is merely one more thing to eliminate from an investigation. Water will find its way in from a variety of access points: door/tailgate seals; through the bulkhead (along wires or pipes which pass through it) or via a blanking plate, brake servo, cable; sunroof; and even the heater matrix. In some cases, panels seams will allow water ingress, or corrosion.
For wiring to be ‘corroded’ as such suggests a little more than a leaking windscreen, no?
Yes – not much moisture out here! Obviously what there is seems to have found its way in to my car though. I think I might need to get someone other than the dealer to have a look and check they don’t just use “windscreen” as an excuse. Many thanks for your help.