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How Much to Fix Misted Windows?
The estimated misted window repair cost starts from £100 for a standard small single-glazed sash window and reaches up to £850 for a large double-glazed bay window.
If you are only replacing the glass pane, so you should expect to pay around £50 to £150 per pane.
What affects the cost of replacing a blown window?
The overall price of repairing misted windows will depend on whether you need to have the entire window replaced or just the double-glazed units.
The type of glass is also a determining factor with single-glazing costing around £100, double-glazed windows priced from £200 and triple glazing priced over £350.
The price is also going to vary depending on the size of the panel you are replacing and the ease of access to it.
The cost to repair a sash window is determined by the condition of the unit and the number of panels that need replacing.
Table of Contents
- How much to fix misted windows?
- Replacing blown window prices
- Supply only costs
- Additional costs
- Labour costs and time frames
- What does replacing a blown window entail?
- Can I replace a blown window myself?
- Signs a window has blown
- Reasons to replace a blown window
- Benefits of replacing blown windows
- Where can I take my old windows?
- Planning permission
- Building regulations
- Frequently asked questions
- Sources
Replacing Blown Window Prices
Below are some estimated costs of hiring a window specialist to replace a blown window:
| Description | Avg. Cost | Duration |
|---|---|---|
| Small single-glazed fixed sash window | £100-£150 | 40 minutes |
| Small single-glazed opener sash window | £150-£200 | 1 hour |
| Standard double-glazed bay fixed window | £200-£250 | 1-2 hours |
| Standard double-glazed bay opener window | £275-£325 | 1-3 hours |
| Large triple-glazed bow fixed window | £350 - £400 | 2-4 hours |
| Large double-glazed bay opener window | £600-£850 | 2-6 hours |
Supply Only Cost
Planning to repair a blown window yourself?
If so, you need to understand misted window repair material costs, including window size and glass type.
The below table sets out the estimated cost of a DIY blown window replacement.
Window Prices By Size
Here are the average prices for double-glazed casement windows:
| Window Size (mm) | Avg. Cost |
|---|---|
| 500mm x 500mm | £150 - £500 |
| 1000 x 1000mm | £200 - £550 |
| 1200mm x 1200mm | £250 - £900 |
Additional Costs
Now, let's take a look at some common additional jobs which are normally completed alongside blown window replacement.
Window Frames
One of the most popular jobs is window frame installation. To spruce up your windows, you choose from low-cost options such as white uPVC window frames which is normally priced at £250 to £750 per window.
Fibreglass window frames are also a great budget option, as they only cost around£500 to £800 per window.
Looking for a premium option?
More expensive options include wooden frames which have an average cost of £600 to £1,500 per window, while aluminium window frames range from £550 to £1,000 per window.
Window Trims
To enhance the look of your windows, you may also want to update your window trims.
There are various finishing trims to choose from including wood which costs anywhere from £6 to £10 per m2.
Aluminium trims are pricier at £12 to £17 per m2.
The most expensive finishing trim you can choose is PVC which costs around £17 to £26 per m2.
Window Handles
To ensure your windows open properly, you may want to consider updating your handles.
Popular options include cockspur handles which cost an average of £5 to £12 each, while espag handles are normally priced at £8 to £20 each. Additional handle options include the spaded style which cost around £12 to £18 each, while and tilt and turn options tend to cost from £10 to £19 each.
Window Sealant
You should also compare the prices of different sealant types, including acrylic, which on average costs under £1 per 100ml, while silicone sealant is normally priced at £1 per 100ml.
One of the more expensive options is polymer which has a standard price of £6 per 100ml.
Window Security
When updating your windows, you may want to implement window security feature to protect your home.
This could include adding security bars to your windows, which are usually priced at £30 each.
You could even invest in toughened glass which should add around £35 or more to the price of each window.
Want to step up the security further?
Why not purchase a window security camera? This should cost around £200 to £300.
Window Disposal
Another common cost is the removal and disposal of your blown window, which is typically priced at around £140 to £400 for professional waste disposal, although this will, of course, depend on the amount of material getting thrown away.
However, you could always hire a skip yourself, which will cost upwards of £70.
Cost Breakdown Calculator
Individual Costs Of Replacing A Large Blown Glass Window - Total Cost: £300
50%
Materials
£150
40%
Tradesmen
£120
10%
Waste Removal
£30
Labour Costs and Time Frames
Now, let's take a look at the cost of hiring a professional window fitter> and how long it takes to replace a blown window.
A window fitter or glazer will usually work at a cost of around £100 – £175 per day, although this will depend on the type and size of the job. For example, if you are just having your glass replaced on your uPVC windows, this may only take 10 minutes to complete and should only cost around £15 per unit.
However, for a full uPVC window replacement, this can take around 30 minutes for one 500mm x 500mm window and may cost around £75 per frame.
What will increase the labour cost?
Labour costs may increase for other materials like wood window frames, as tradespeople tend to charge around £20 per unit for glass replacement. While a full wooden window replacement would cost anywhere from £75 per frame for a new softwood window up to £85 per frame for a hardwood window.
You may find that larger-sized windows take longer. For example, two installers are normally hired to install a large window measuring 1200mm x 12000mm which could take up to 2 hours, or 3 to 4 hours for one installer. While a bay or bow must be installed by at least two people and should take around a half a day to fit.
What Does Replacing a Blown Window Entail?
To help you understand what replacing a blown window involves, here's a step by step breakdown:
- To begin the work, the window fitter will check to see if there is an appropriate lintel in place to support the structure, if not then a temporary support will be required.
- They will then measure the glass unit carefully and order the replacement windows. If you have a blown window, it may not be necessary to replace the entire window, you may find that you can replace the double-glazed unit on its own.
- The glass that arrives will have been cut to fit into your window frame and account for all of the frame-fixing measurements.
- To remove the existing glass unit, a sharp chisel is typically used to remove the beads on each side of the glass, except the top as this will keep the glass in place until it is ready to be moved.
- After this, any dirt and debris will be cleared away in the open space.
- Once the area is clear, the new glass unit can then be installed into the window frame. Then spacers should be used underneath the sealed unit to ensure it is completely square.
- Once the glass is in place, the beads can then be reinstalled and clicked in to secure the glass.
Can I Replace a Blown Window Myself?
It is possible to replace a blown window yourself, but as this is a technical job that must be done accurately.
You may find it easier to employ an experienced window specialist to do it for you in less than half the time.
Also, if your window is located within a load-bearing section of the wall, then the risks are even bigger.
If your window is not installed properly, its lifespan will be short, so it is worth getting an expert window fitter to do it for you.
Poorly installed windows will leak, let in draughts as well as noise and will not work effectively as an insulator.
If you are not replacing the entire window, then you could always take on a DIY project for fitting the window unit, which will require a lot less skill.
All this will involve is purchasing a chisel which will cost around £2 to £9. This should be used to loosen the trims in order to remove the damaged glass and replace it with a new unit.
When securing the trims back on, you should use washing up liquid on the edges of each trim to ensure the trims slot in easily and fit right.
Signs a Window Has Blown
Over time double glazed windows may become cloudy, largely because the seal between the two panes of glass has begun to leak. The problem is called a blown window and may be particularly bad when temperatures drop.
The non-toxic gas that is sealed between the two window panes is the key to the glazing’s energy efficiency, so if you have a blown window, your double-glazing will not be functioning properly either.
Unsure whether your windows have blown?
Here are some common signs which help you decide whether blown window repair is necessary:
The common way to determine whether your window is blown is to check for fog on your window that cannot be wiped away from either side, as it has formed between the two panes of glass.
You may also notice a draught in your home, which could be coming through the open seal of your window.
Another clear sign that your window needs replacing is the appearance of water or even mould surrounding your window. If there is mould, then this could be the beginning of damp problems, which can be rectified quickly with a blown window replacement.
Reasons to Replace a Blown Window
If you have a blown window, then you should consider getting it replaced as soon as possible to prevent the following problems:
Condensation Build-up
If the seal is damaged on your window, then this allows moisture to penetrate the window panes. Once this begins to build-up, you may notice condensation on the inside of the windows which cannot be removed. This is not only unattractive but can also cause further problems as damp can start to form, which can cause rot or mould.
Having a blown window replacement can rectify this problem easily and may only require glass replacement rather than the entire window.
Heat Loss
If your window has blown, then you may notice that your home has become a lot colder than usual. This is because the seal is broken on your window, so the heat in your home can escape easily. This will not only make your home feel draughty but may also force you to use your heat more, resulting in increased energy bills.
To reduce the amount of wasted heat, you should speak to a professional window specialist who will be able to replace your window and make your home warmer and more energy efficient.
Lack of insulation
Double-glazing offers high-quality insulation by trapping gas between the two glass panes to prevent heat loss and damp. However, when a window is blown, the insulation will start to dwindle, which is the main reason why your home may start to feel cold.
To prevent a chill in your home, you should have your windows replaced as soon as possible, especially in the winter months when insulation is a necessity.
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Unattractive Exterior
The most obvious sign of a blown window is the misting that appear on the windows, which can be unattractive. At first, it may look like surface condensation that can be wiped away; however, if this is not possible, then this is a clear sign that your window has a blown seal.
To improve the look of your home’s exterior, you will need to replace either the window panes or the whole window, which will enhance the property’s aesthetic.
Reduced Natural Light
The misting that appears on a window with a blown seal is not only unsightly but can also reduce the amount of natural light that reflects into your property. This will make your home appear dark, especially in rooms with minimal light fixtures. It can also reduce visibility, which may prevent you from having a clear view of the outside of your home.
Having a new window fitted in its place will enable you to enhance the light in your home and utilise the space, while also improving your own view to the exterior of the property and its surroundings.
Benefits of Replacing Blown Windows
Here are the main benefits of blown window repairs:
Damp Prevention
Replacing a blown will eliminate the production of damp inside and outside your home, as condensation is less likely to occur on fully-insulated windows with either double-glazing or triple-glazing. This will also prevent a build-up of bacteria caused by the damp, making your windows much easier to maintain.
Energy-efficiency
Investing in a professional blown window replacement will allow you to boost your home’s energy efficiency. This is because modern window materials, such as double-glazing or triple glazing can prevent heat loss, as they can trap heat easily. This means that you will be less likely to use your heating, as your home will feel much warmer on a daily basis.
Lower Utility Bills
If you have a blown window, you might notice a slight surge in your energy bills. This is because a broken seal will enable heat to escape which will make your home feel draughty, which will result in your turning up your heating more often. By replacing your blown window, you can prevent cold air getting in as well as avoid heat loss, which over time will enable you to reduce your energy bills as your home will become comfortably warm again.
Reduced Noise Pollution
If the seal on your window is broken, then you may be able to hear external noises more clearly, which is not good for privacy. This may be more likely in urban areas where traffic noise can be an issue. However, with a replacement window you can reduce the outside noise levels and make your home a much quieter and more private place to live.
Where Can I Take My Old Windows?
Once your old windows have been removed, you can either keep them, get rid of them yourself or have an installer dispose of them, which could cost up to £100 for several windows.
You could always dispose of them yourself by taking them to your local tip. Some recycling centres advise you to remove the glass before bringing them to the tip, although uPVC windows are usually left as they are.
If you’ve had several windows replaced, then you may need to hire out a skip. This can cost anywhere from £70 a day to £250 a week.
The price of skip hire will depend on your location, as well as the size you require so make sure to check the costs of skip companies in your area making sure you choose the right size.
Planning Permission
You do not need to apply for planning permission if your blown window replacement adheres to the following conditions:
- The windows will have the same or a similar appearance to the original design.
- Minor improvements will be made such as repainting or maintenance
- Secondary-glazing installation is allowed.
- Your property is not a listed building or located in a conservation area.
More than likely, you will not have to apply for planning permission, however, you should still check with your local council before making any permanent changes which could result in a fine. If you do have to apply then this will cost around £200 for minor changes.
Building Regulations
In April 2002, changes were made to the building regulations regarding replacement glazing. This covers thermal performance, air supply, safety precautions, ventilation and means of escape which must all meet the following standards:
- Window replacement must offer better energy-efficiency than the last installation.
- Safety glazing must be installed in critical areas making sure that it is placed near an unobstructed area which spans 0.33 square metres and should be at least 450mm in height and width.
- Trickle ventilation should be added to windows in areas where more steam is produced.
- Fire-resistance is required for windows in unprotected areas and fixed windows should be installed if necessary to avoid fire spreading.
- When replacing a window, the size must be no less than 450mm in height and width and a cill height of no more than 110mm above the floor.
Making changes to a controlled fitting such as an external window will require you to use a window installer that is registered under the competent person scheme, then once the work is complete you will receive a building regulations certificate.
You can also do the job yourself or hire an unregistered professional. However, you will have to apply for approval from a building control body who will determine if the installation meets the current standards. Once approval has been given, a certificate will then be issued.
The cost of this will vary depending on your location, as each local authority has its own individual prices, so you should check your local council’s website for validation.
FAQs
How often should you replace double glazed windows?
Given the right factors, most double-glazed windows will usually last for around 20 years, some may even last as long as 30. Therefore, it is worth ensuring that you choose a good quality brand and have your windows properly installed so that they last for a long time.
Can I save energy by getting my windows replaced?
Yes, around 10% of your home’s heat is lost through your windows and doors. Although replacing your windows with double glazing can be an expensive outlay, by swapping to more energy-efficient double-glazed windows you can save hundreds of pounds annually, as well as keeping out unwanted noises too.
The insulating gap between the two sheets of glass that create the double glazed window stops warm air from escaping from your house so quickly. You can even get triple glazed windows with two gaps positioned between three panes of glass for extra insulation. Low emissivity glass is the most powerful type of glass for double glazing. Low emissivity glass features an invisible coating of metal oxide on one of the internal panes of glass that adds an extra layer of energy efficiency to its performance.
The British Fenestration Rating Council have created an energy efficiency rating to make it easier to see how effective different types of windows are. The rating ranges from G to A+ and includes the performance of both the glass and the frame that make up the window unit. The best-rated windows may display the Energy Saving Trust Recommended symbol to make them easier to identify.
Do glazed windows increase the value of your home?
Yes, double glazing windows is a popular and easy way to add value to your home. Installing high-quality and energy-efficient windows can actually offer returns of up to 78%.
What is the best material for replacement window frames?
Traditional wood is still a popular option because of its classic aesthetic and robust quality, however, the long-term damage from rot and heat is a downside. Fibreglass is often chosen as a more long-lasting alternative to wood that is also easy to maintain. Vinyl is the most cost-effective and energy-efficient option. Available in a wide range of different styles and colours too, vinyl is a great choice for replacement window frames.
What does a blown window mean?
A blown window occurs when a gap is created between glass panes which allows moisture to come through and create constant fogging. This will need to be replaced as it is no longer energy-efficient and does not provide the insulation that your home needs.
How much does it cost to replace a broken window?
The window replacement cost can vary depending on the damage. For example, if the glass is broken then this will cost around £200 to £500. While replacing the glass unit may only cost £200 to £600, depending on the type of glass it is.
What causes blown windows?
Over time the seal of a window will begin to fail, although they do last a long time sometimes there are issues during manufacturing where too much air is left in-between the glass panes causing what is known as a blown window.
How do you tell if the seal on a window is broken?
If you notice constant fog showing up on your windows which cannot be wiped away then this could be a sign that your window seal is broken. Moisture may also show up between the glass panes, and you might also feel a draught.
How to Find & Hire Window Fitter
If you’re not experienced in DIY or you need your windows completely replaced, then you should definitely hire a professional window fitter. This should cost around £100 to £150 a day, although this will, of course, depend on how many windows need fitting, as well as the size and materials used.
Before choosing someone for the job, you should check that they are registered under the competent person scheme or have extensive experience of dealing with blown window replacements. It is also important to check if they have insurance, as this will protect you both should anything go wrong.
Sources
https://onlywindows.co.uk/double-glazing-cost/
https://windowgeeks.co.uk/steamed-up-windows/
https://crystalclearwindowinstalls.com/11-different-types-window-glass/
http://www.newsontheblock.com/news-opinion/dont-replace-windows-when-you-can-repair-them
https://reolink.com/top-7-easy-diy-ways-to-secure-your-home-windows/
https://www.cloudy2clearwindows.co.uk/news/double-glazing-become-cloudy/
FAQs
How much does it cost to fix foggy windows? ›
How Much Does It Cost to Repair Fogged Windows? Window thermal seal repair costs about $245, with most homeowners paying between $70 and $120. You should also plan to pay $30 to $50 per hour for labor to have a pro perform the repair.
How much does it cost to fix window condensation? ›If condensation forms between the panes in your double-pane or triple-pane window, you'll likely need the window seal repaired or a pane restored. This repair typically costs around $140, or anywhere between $100 and $200, depending on the size and type of window.
Can fogged windows be repaired? ›Alternatively, foggy windows can be repaired using a defogging procedure. Window defogging is capable of producing cosmetic results that help improve visibility in your windows. One benefit of window defogging is that the windows stay in place; they are simply repaired.
Can moisture in windows be fixed? ›Presently, there are two different ways to deal with condensation: either replace the window (you can usually replace only the glass unit and not the whole window) or hire a local company to drill holes in the outer pane, clean the windows from the inside and install one-way air vents to help prevent future ...
How do you get moisture out of a double pane window? ›Silica Desiccant
A desiccant is an absorbent material designed to maintain dryness in the space it protects. In a double-paned window, silica pellets inside the aluminum perimeter strip absorb moisture from any incoming air that enters the space between the panes.
Dual-pane units are made with a thick sealant around the edges, but the seal is never perfect. Over time, warm air, which holds more moisture, seeps into the gap between the pieces of glass and releases that moisture when it cools. The desiccant absorbs it, keeping the glass clear — until the desiccant stops working.
Do windows need replaced if condensation? ›Do windows with condensation on the inside need replacing? T&K recommends that any windows experiencing window condensation between the panes should be replaced. Failing double glazed windows will still retain more heat than a single glazed window.
Will window condensation go away? ›The only way to get condensation out of windows is to replace the faulty piece. In some cases, this might just be the panes, but it could also mean replacing the whole window.
Should I be worried about condensation on windows? ›The bad news is that the moisture caused by condensation is a breeding ground for mould and mildew that can cause a range of health problems from allergies to infections. Left untreated, condensation can rot wooden window frames and start to cause damage to structural integrity.
Can misted double glazed windows be repaired? ›Can Misty Windows Be Repaired? Yes. The sealed glass units within your windows can be replaced, which is the most cost effective solution.
How much does it cost to reseal double pane windows? ›
What's it cost to reseal double-pane windows? In most cases, repairing a window seal will cost you between $70 and $150 per-window. The cost of repairs will be higher if you need glass replaced, moisture removed, or the sash repaired, as well.
How do they repair misted windows? ›A misted-up window is due to the seal on the glass, which has nothing to do with the frame itself. Indeed, as long as the frame is in good condition, you simply just need to replace the glass unit.
What clears moisture from inside windows? ›Turn on ceiling fans, even in the winter, to help move air around and push warm air down from the ceiling. If it's not too cold out, you can also circulate air by opening your windows. This will let out some of the moist air that may be trapped in your home.
Will a hair dryer remove condensation between glass panes? ›Hairdryer – Using a hairdryer on the affected area will clear up the condensation quicker but it's only a quick fix and won't actually solve the problem. Ensure you don't have any cracks in your windows before you apply any heat. Ventilation – Ventilation is the key solution if the condensation is on the inside pane.
How do you clear misted double glazed windows? ›Use a hair dryer. If you notice condensation on your windows in the morning, use a hairdryer to evaporate moisture trapped between the glass panes. Applying heat to the window (from a safe distance), will quickly help to remove stagnant water droplets stuck in between your double glazing.
Why is my window permanently foggy? ›If you see fog in your windows, you have a problem with your window's insulation. An insulated window's seal should prevent fogging, but if it doesn't, you need to replace your window. As you figure out the reason for your fogging windows, check your window seals, glass and sash.
Does condensation on windows mean mold? ›Why does mold often appear around windows during the winter months? The answer is humidity and condensation. The warm, indoor air can condense around cold, drafty windows, making them “sweat” with moisture. That, in turn, causes the window sills and casings/trim to become damp and grow mold.
Is condensation on house windows normal? ›So, the water you're seeing isn't unusual. Condensation will appear from time to time on even the best-performing windows—in fact, it's often noticed more on high quality windows, because of their energy efficiency. Everyday living generates a surprising amount of indoor moisture.
Does condensation on windows mean bad insulation? ›The appearance of condensation between a double-pane of glass indicates that the windows are not doing their job properly. The air-tight seal holding the insulating gas inside has failed, letting all the insulating gas out.
Does a cold house cause condensation? ›Condensation is caused by warm moist air coming into contact with cold surfaces such as windows and walls. It happens mainly during the colder months, regardless of whether the weather is wet or dry. Condensation is completely normal and is the most common cause of dampness in the home, especially in colder rooms.
What temperature should I keep my house to prevent condensation? ›
It's recommended to keep your living spaces at between 19°C and 21°C, with bedrooms kept around 18°C. Under-heating is one of the biggest causes of condensation inside the home when combined with poor ventilation, as warm moist air can't escape and forms as condensation on cold surfaces like windows and walls.
Is condensation on bedroom windows normal? ›Your bedroom windows have condensation on the inside
This will usually happen if you leave the en-suite door open so the steam travels into your bedroom. This is a natural phenomenon where water vapour turns back into liquid when it comes into contact with something cooler in temperature, like your bedroom windows.
Yes, double glazed windows can be resealed! Like any type of window, however, we recommend that a professional tackles the job to ensure a resolution that really works.
Are window seals expensive to replace? ›Repairing a window seal could mean a few different things depending on where the seal is broken and how much of it is broken, but a fair estimate for the cost of a professional window seal repair is around $100.
Is it worth replacing window seals? ›The best way to stop cold air from entering your home is simply to replace your window seals. If your seals are more than 10 years old then they will almost definitely need replacing. Doing so will drastically increase the efficiency of your home.
What is the life expectancy of double pane windows? ›Guarantees aside, the life expectancy of double pane windows is less than 15 years. This number represents a reasonable life expectancy of the best double pane windows. Guarantees are a serious concern within the glass industry.
How do I get rid of foggy windows in my house? ›Ventilate your home: Have good air circulation throughout the home. Keep fans running, even during the winter, to prevent the warm air from sticking to your windows. Get rid of moisture: Use a dehumidifier. A dehumidifier removes moisture from the air that could get between your windowpanes.
Can foggy windows be cleaned? ›Alternatively, you can create a cleaning solution that is equal parts water and vinegar. Spray the glass with the solution: When your solution is ready, place it in the spray bottle and spray the windows. Next, use the microfiber cloth to rub and clean the foggy windows.
Are foggy windows a problem? ›Cloudy windows can be annoying, as they limit your ability to see outside. But foggy windows also cause other problems that can lead to significant damage, such as mold growth, water damage, and unsightly stains on floors or walls.
Does Heat get rid of foggy windows? ›Letting your defrost run at length on a warmer temperature can help prevent fogging in many cases. However, if you haven't been running defrost and your windows get pretty foggy, cold air is the way to go.
Do you use hot or cold air to get rid of foggy windows? ›
The warm air from the defroster helps evaporate the moisture near the windshield, but it's only a temporary fix. If you want to stop the fog from forming, experts recommend using cool air to lower the temperature on the inside of the glass.
What causes house windows to fog up on the inside? ›Your windows are the coldest surfaces indoors. During colder months, indoor air is much warmer and holds more moisture than outdoor air, which is colder and dry. Warm, humid indoor air cools and contracts; as it contacts the cooler windows, the moisture condenses on the glass.
What causes haze on inside of house windows? ›Condensation on the interior of windows and doors occurs when warm, humid air comes into contact with cool glass. This is especially common in the winter when outside air is cold and dry, and the indoor air is warm and humid.
Can you make foggy glass clear again? ›Soak a small rag or dish towel in vinegar, then rub a portion of the glass with the rag. A glass that's milky from hard water buildup should become clearer with each wipe.
Can double glazed windows be repaired? ›Can double glazing be repaired? Yes, it can. Not only can double glazing be repaired but it's a much cheaper solution than replacing your faulty windows with brand new units.
Should windows with condensation be replaced? ›Do windows with condensation on the inside need replacing? T&K recommends that any windows experiencing window condensation between the panes should be replaced. Failing double glazed windows will still retain more heat than a single glazed window.
Does condensation on windows mean they need to be replaced? ›Although condensation doesn't signal that you need new replacement windows, it's still possible that you do need some. If you've had your windows for years and you notice that they are a little drafty, then you may want to consider investing in new windows.
What is the fastest way to defog windshield? ›Mix 1/3 part water and 2/3 part isopropyl or rubbing alcohol. In the morning, spray this solution on your windshield and the ice should disappear instantly. If you're looking for other ways to defrost your windshield, try other pre-made solutions at your local dealership or look into a portable defroster.