How to Protect Your Windscreen from Frost

Winter is just around the corner. We can already feel it with these cold nights and rainy, grey days. One of the biggest chores none of us look forward to is defrosting. Especially early in the morning, in the freezing weather, when you’re already late for work. Today we are going to discuss some of the ways you can protect your windscreen from frost.

How to Protect Your Windscreen from Frost

Garage, Car Port and Other Shelter

Of course the most fool proof option is to park your car in a sheltered place. This can be a garage, a car port, a shed, or some other kind of covered storage option. This will keep your car out of the weather and away from the weather elements that allow the ice crystals to land on your car, that will form into frost.

Car Covers

If you don’t have any access to a storage shed or garage, etc, then why not try a car cover. While it might get tedious takin the cover off and putting it back on at night, it performs the same function as the other shelter options. They come in a wide range of materials, suitable for a wide range of weather conditions. 

Alternative Windshield Covers

No windscreen covers? No problem! If you don’t have a windscreen cover, other items can work. Car mats can work well. They are easy to find and readily available. They won’t cover the entire windscreen but they will cover a large portion. Carpet remnants will work almost as well. You can also use things like shower curtains and tablecloths.

Park Facing East

When parking, we recommend you always park east as the wind typically blows from the west to east. This will allow protection from the icy wind and let the sun clear your windscreen, enabling it to naturally defrost itself, making it easier for you to get going in the morning.

Covering Side Mirrors

Too many people forget to cover their side mirrors, which are just as important as the windscreen. You need them to study the road around you. If you can’t get proper covers you can cover your mirrors with plastic bags and rubber bands to hold them in place. You can also use clothespins in the place of rubber bands.

Protecting Your Windscreen from Frost is important


There is always the traditional solution – scraping. Just always make sure the edge of your scraper is in good condition. If there are any nicks or uneven places on your scraper it can scratch your windscreen. Get a good quality scraper and take your time – better to be a little late then cause damage to your windscreen.

Use a De-Icer Spray

You can always use – or make – a De-Icing spray. There are couple bottles you can pick up from your local supermarket or auto store. Or you can make your own. But no matter what type of de-icer you use – store bought or DIY – should be stored at room temperature in your house, not in your car. Here are a couple recipes:

Isopropyl Alcohol and Water

Combine 2 parts of 70% isopropyl alcohol with one part water in a spray bottle. This liquid has a freezing point of 5 degrees – rather than the 32 degree of water – so applying this mix to your iced up windscreen will have immediate effect.


Pour water into a spray bottle and add a scoop or two of salt. Salt has a lower freezing point than fresh water it will melt ice on contact. Road ice is even more effective than table salt.

Melt Windscreen Ice from the Inside

Every car contains a defroster. Simply get in your car, turn the temperature on to the warmest setting and select “defrost”. Ensure you choose the defrost setting for both front and back of the car, at full blast. Ensure you are doing this outside, and not inside an enclosed space. Any blockage of the tailpipe could result in carbon monoxide poisoning.

Preventing an Icy Windscreen

The best way to tackle an icy windscreen is to prevent one in the first place. Below are some methods we suggest to prevent an icy windscreen developing.

Vinegar Spray

We suggest, each night, spraying your windscreen with a solution of vinegar. Mix 3 parts vinegar to 1 part water in a spray bottle. Liberally spray your windscreen, side windows, side mirrors, and back windscreen in the mixture. Then wipe them all down with a squeegee or an old rag. This will prevent ice settling on your glass.

Rubbing Alcohol

Like above, mix 2 parts rubbing alcohol with 1 part water in a spray bottle and liberally spray down your windscreen, mirrors, side windows, and rear windscreen. This, too, will prevent ice settling on your auto glass.


Saltwater has a much lower freezing point than water, so when frost hits it, it can’t settle. So if you have no vinegar or rubbing alcohol, salt will have the same effect.  To 2 scoops of salt into 1 part water in a spray bottle will be perfect.


Did you know onions can help protect your windscreen? It might seem strange but rubbing half an onion over your car windows at night will actually stop frost from being able to form on your auto glass. This is due to the oil that comes from the onions.

Don’t Damage Your Glass

It is important to keep our suggestions in mind when you battle with frost in the winter. While it is frustrating to take time in the morning or evening to safely clear off the frost from your windscreen, taking that extra time will help ensure your safety. Don’t just scrape a tiny bit off with your credit card assuming that’s all you need to see. And never dump a bucket of water on your windscreen! Warm or hot water will cause your windscreen glass to crack due to thermal shock. And even cold water is a bad option as it could freeze on contact, making your situation worse.

Winter Windscreen Damage? Contact Us!

Emergency Windscreens is a fully mobile service. If you have a chip or a crack – or you have had a mishap when trying to clear your windscreen – we can come to you, no matter where you are. Home, office, anywhere, we will get you back on the road as soon as possible. We carry a wide range of autoglass and we are able to work on everything from buses and tractors, to cars, to luxury models. We can also replace windscreens if needed. We will assess the damage onsite and let you know whether you need a repair or replacement, and perform it onsite.

Contact the Emergency Windscreen team today for help and advice!