What Is Glazing on Windows?
Glazing on windows might seem like a very technical term. However, in reality, it is really just all about the glass. The term refers to working with glass. Hence, a glazier is someone who works with or installs glass. Simple enough, right?
Which brings us to glazing on windows. Windows, more than doors, need glass. This is because doors are a barrier, while windows are, well, windows. You should be able to look out of them. Also, they should let in sunlight. In short? They need to be clear.
However, windows are also the single-worst point for letting out heat. This is where double glazing and triple glazing on windows come in. These are two ways of installing the glass in your windows to trap and retain heat inside.
So, what are double and triple glazing? Moreover, does single glazing exist? How are they different from each other?
What Is Single Glazing?
If you break the term into its parts, you can easily figure out what single glazing on windows means. It is literally a single pane of glass. This is how windows were originally made. You had a frame, and it had a single pane of glass fitted in. If you used a clear pane of glass, you got a beautiful view. You also got plenty of sunlight.
However, a single pane of glass is terrible at keeping in the heat. Why is that? Simply because glass can conduct heat. As a result, when you warm your room, the heat rapidly escapes out. In fact, studies show that single glazing on windows can let almost 20% of the heat out.
What does that mean for you? It means that you have to constantly heat up your room to keep it at a steady temperature. This is not good for your heating, as it is constantly working. It is bad for you, because the extended heating makes your heating bills quite high.
Finally, it is not good for the environment. The more energy you consume, the more fossil fuels you burn. As a result, your carbon footprint grows. As you can see, single glazing on windows is quite inefficient at heat retention. Moreover, it’s bad for your wallet and the environment.
What Is Double Glazing?
Double glazing is a process where you install two panes of glass in a window. However, it’s not just two panes you install any way you like. They have a specific configuration. The double glazed sealed unit has two glass panes separated by a gap. This gap is 16mm or less. What does it do? It keeps air from circulating.
Let’s understand why this is important. As we learned earlier, glass conducts heat quite rapidly. However, air is a bad conductor. When you seal a pocket of air between two panes of glass, it acts like insulation. As a result, you reduce the amount of heat lost through conduction.
In some cases, the gap contains a gas like argon. Again, this gas helps insulate the glazing on windows. For even better insulation, you can have a vacuum between the two panes. As a result, you can reduce the heat loss by convection as well.
Convection, if you’re not familiar with the term, is a process of heat transfer. When you boil water in a pan, you heat it from the bottom. The hot water rises to the top and the cold water at the top sinks. This alternating flow is a convection current. It keeps flowing until all the water is at the same temperature.
Similarly, the air in the gap can transfer heat by constantly moving. A vacuum and the small gap in the glazing on windows, with no space for air to move, can help reduce it.
What Is Triple Glazing?
Triple glazing on windows is the same as double glazing, except with three panes of glass. Because of the third pane, and the additional gap between the inner and outer panes, you can further reduce heat loss. Triple glazing is slightly better in retaining the heat than double glazing on windows.
However, the high cost can negate the potential benefits. In fact, the cost benefit is high only if you replace old single glazing on windows, instead of new double glazing.
Should I Replace My Windows?
If you have single glazing on windows in your home, you should probably get it replaced. While the cost may seem exorbitant, you will make considerable savings in the long term. However, if you already have double glazing on windows, it doesn’t make sense for you to remove them.
One reason to replace double glazing on windows is if they are old and not performing as well. In this case, you will improve the performance of your home with double glazing. Another reason can be if the glazing on windows is damaged. You may have a window that has a crack or an impact mark. In such a scenario, you might want to replace the broken window.
However, if your home is a heritage property or in a conservation area, you might have to consult your local building authorities. As per building regulations, you usually aren’t allowed to make changes to the outer appearance of the building. In such a case, you should consider secondary glazing.
Where Can I Find Prices for Glazing My Windows?
If you want double glazing on windows in your home, you can start by comparing prices with us! We can help you find instant prices. What’s more, we can even recommend reliable double glazing companies in your area. To get your personalised glazing on window quotes, try out our online quote generator.
This is a handy tool that takes your requirements and specifications. It uses these to generate a quick quote for glazing on windows for you. You will have this quote emailed to you, so you can refer to it at any time. Alternatively, you can fill up our online contact form.
We have a team of qualified and helpful people. One of them will get in touch with you. They will help you get the prices for double glazing on windows for you. Moreover, they will put you in touch with FENSA or Certass approved local installers. Get a quote now!
Frequently Asked Double Glazing Questions
Frequently Asked Double Glazing Questions
How much does it cost to replace a sash window?
The cost of replacing a sash window will depend on many factors including: style, size, material and glazing. A wooden sash window will cost significantly more than a uPVC sash window. A wooden sash window can cost up to £1000. Wooden windows are more expensive to manufacture so expect to pay that bit more. uPVC sash windows can be designed to mimic wood and are much cheaper in price. The starting price for a standard uPVC sash window is on average £525.
Can I install double glazing into my original sash windows?
This will depend upon what type of window you have. Replacing existing moving sashes with new, double glazed replicas might to be possible.
How much does sash window restoration cost?
The cost of sash window restoration will depend on the survey result. Standard draught proofed sash windows (without sill replacement) usually starts at about £500 per window. The time taken will also depend on the survey result.
Should I replace my old sash windows?
Sash windows are a key feature for many traditional period buildings. Sash windows were traditionally built using timber, which is fairly high maintenance and has a tendency toward rotting and warping. Over time, these windows can become draughty and insecure. uPVC sash windows are a great way to experience the benefits of modern double glazing, without sacrificing the aesthetic of your home. uPVC sash windows will not rot or warp and require little maintenance. They are also thermally efficient, which means that your home will not require as much heating.
How much does it cost to double glaze a 3 bed house?
On average a double glazed window will cost between £350 and £400, with a uPVC door typically costing £600. This means that double glazing a 3 bedroom semi can cost between £3500 and £5000.
How much does it cost to install a window?
The prices given in our pricing tables, our online quotes and our costing calculators reflect the price of the window itself as well as the cost of installation. For example, a 500mm x 500mm casement window will cost between £150 and £175 including the cost of installation.
Why Is uPVC Used For Window Frames?
UPVC is used for window frames because it strong, durable, energy efficient and long lasting.
Is Double Glazing Easy to Break?
No, double glazing is not easy to break which means your home will be more secure. When attempting to smash double glazing often what happens is that the first pane of glass and the second will remain intact. This is due to the argon gas working as a shock absorber. This will mean the smash is very loud but unsuccessful on the first attempt.
Is Double Glazing Worth It?
Double glazing helps make your home more energy efficient as it prevents the loss of heat. During the summer, it helps to keep the heat out of your home. It provides your home with sound insulation which is perfect for houses that are in busy areas and streets. Double glazing also makes your home safer and more secure.
How Long Does Double Glazing Last?
It is important to note that the argon gas that separates the panes of gas, giving double glazing its energy efficiency will eventually leak out overtime. Double glazing has an average life span of about 20 years, however, this can vary depending on materials used and the installation.
How Long Does It Take To Install A New uPVC Window?
Once you place your order for a new window, it takes 4-6 weeks to build and manufacture the product. On the day of installation it could take anywhere from 3 hours to a whole day, depending on size, shape and style of window.
How Do I Know If My Double Glazing Needs Replaced?
Double glazing will need replaced after a while due to the nature of the design – the gas that separates the two window panes slowly leaks out over time meaning the energy efficiency of your window is compromised. If your double glazing allows cold spots; water to seep through the frame; has cracks or chips in the window or has a build-up of condensation between the two panes of glass (misted windows), you should probably look into getting your double glazing replaced or repaired.
How Long Does It Take To Install A Window?
From the moment you purchase your window it will take anywhere between 4-6 weeks to build and manufacture your window for you. The actual installation itself could take anywhere between 3 hours to a full day.
Should I Double Glaze My Windows?
Double glazing works to make your house more energy efficient saving you money on your heating bills. Double glazing also provides sound insulation which is perfect if your house is situated near busy roads and noisy areas. Double glazed windows are also tougher and harder to break than single glazing windows making your house more safe and secure.
What Can Cause Double Glazing To Crack?
Double glazing can crack for what appears to be no particular reason at all. A sealed window unit faces constant pressure either side of the glass, however, most of the time double glazing is strong enough to deal with this. Winter can be one of the worst time for cracked glass as the difference of temperature on either side of the glass stressing it to the point it can crack.
Can My Windows Be Installed In Cold And Rainy Weather?
Yes, windows can be installed in any weather, however, it is important to remember the safety of the installers who come to put in your window and that the rain could damage things your property due to the fact there will be a hole in the wall for quite some time during installation.
Is uPVC Flammable?
No, uPVC isn’t flammable and is actually a fire retardant.
How Long Does It Take To Install uPVC Windows?
On installation day, a uPVC window will take anywhere from 3 hours to a full day depending on the shape, size and style of the window. When you place your order, it will take anywhere between 4-6 weeks to build and manufacture the parts for your bespoke window.
How Do I Know If My Double Glazing Needs Repaired?
There are four tell-tale signs that your double glazed windows need repair or replaced: There are chips and cracks in the panes of glass; there is condensation (misted windows) between the two panes of glass; the window allows cold air through; water begins to seep through the frame. If your double glazing does any of these things, you may need to get your double glazing repaired or replaced.
Does Double Glazing Block Sound?
Double Glazing not only provides heat insulation but it also provides sound insulation too. Double glazing is perfect for houses in busy areas and streets.
What Does Double Glazing Do?
Double glazing makes your house more energy efficient, keeping heating in and keeping the cold out during winter months. During summer months, it helps keep the hot air out, keeping your house cooler. It also works to insulate sounds from busy areas and roads, leaving your house more peaceful and quieter.
Is double glazing easy to break?
Double glazing is a strong option for windows compared to single glazing. The frames are durable and there are high security locking options. As double glazing is made from glass it is possible to break however you will have to exert quite a bit of force to do this. This is practically impossible to do without making a noise.
Is triple glazing better than double glazing?
In most instances double glazing will be an adequate upgrade to single glazed windows. Double glazing offers energy efficiency, noise reduction and security. If you live near a busy road or under a flight path you may want to consider triple glazing for the extra noise reduction that it can offer.
Is double glazing expensive?
Double glazing can be an affordable addition for many homeowners. The price you pay can depend on the quality of the windows and the energy ratings. Other factors are the style of the windows, the colour of the frames and the type of glass. Why not get an online double glazing quote to get an idea of the price.
What is the average cost to double glaze a house?
The average cost to double glaze a house will depend on the size of your house and the number of windows. To double glaze a flat or apartment it will probably cost around £2,000. The average cost to double glaze a house is usually between £4,500 to £7,500. If you collect a number of double glazing quotes you will be able to compare companies and prices.
How much is double glazing per window?
Double glazing prices per window can vary from around £150 to £600 depending on the specification. The window style, type of glass, frame colour and handles are all contributing factors. To find out the true double glazing price per window it is a good idea to get a number of quotes to compare.
What Makes Flush Sash Windows Different?
Flush sash casement windows are specifically designed to imitate the appearance of traditional wooden timber windows by appearing to have the same sashes that finish 'flush' with the outside face of the window.
Can Bay Windows Look Modern?
Bay windows can easily be either modern or traditional depending on the combination of glass and / or coloured uPVC profiles now available. Subsequently, its easy for these windows to seamlessly blend in with contemporary or old properties.
Bay or Bow Window?
Simply put, it really depends! Bay windows offer often much welcome and useful extra storage space to the frontage of homes. On the other hand, bow windows provide a curved shape alternative in terms of look compared to bay windows. They are both beautiful options and can add much character and charm to the right property.
How Much Do Double Glazed Sash Windows Cost?
UPVC sash window prices will vary according to glazing style, your choice of locks and even your chosen colours and finishes. You can get an average sash windows cost using our window cost calculator.
Replacement Sash Windows In A Conservation Area
If your home is a listed property or within a conservation area then you will need to seek planning permission.
Why Should I Choose a UPVC Sash Window?
UPVC sash windows are incredibly attractive and make a stunning addition to any property and are relatively low maintenance thank to their UPVC design. You can enjoy a traditional aesthetic for many years to come thanks to their long standing properties.
Are UPVC Sash Windows Easy To Use?
UPVC sash windows are very easy to use. Their spiral balance mechanism allows for smooth operation so you can open and close your windows with ease. UPVC sash windows are also incredibly low maintenance and require very little cleaning.
How do UPVC Sash Windows Work?
UPVC vertical sliding sash windows are built to either slide vertically downwards or upwards. This opening function makes the UPVC sash window much easier to use compared to traditional wooden windows where the only choice is double hung and single hand.
How Much Do French casement windows cost?
The cost of French casement windows will vary depending on installer but you can get an average casement windows cost using our free online quoting engine
How Does The Tilt and Turn Window Mechanism Work?
The tilt and turn window can be ‘tilted’ inwards due to its unique turning action which allows the window to be easily accessed from both inside and out. All it takes is a swift turn of the handle.
Where Can I Get A Tilt and Turn Windows Price?
You can get a tilt and turn windows price using our window cost calculator which will give you a free and unique quote within a matter of minutes.
What is a Casement Window?
A casement window is attached to its frame by one or more hinges. A casement window is hinged at the side allowing them to open extremely wide. These windows can double up as emergency exits and are perfect for hard to reach places within the home, with many home owners installing these windows behind their kitchen sinks.
Can I Choose My Casement Window Handles?
Your double glazing installer will offer you a choice casement window handles and casement window hardware options so you can achieve the perfect look.
Are There Different UPVC Casement Window Sizes?
UPVC casement windows come in a wide range of sizes to suit your property. You can specify your casement window size in our window cost calculator to get a unique window price!
What Are Flush Casement Windows?
Flush casement windows are where the unit sits flush to the frame, creating a super sleek look.
Will I Have A Choice of Casement Window Locks?
A high security lock will be fitted as standard with your new casement window but your double glazing installer will also offer a choice of security upgrades.
Are There Other UPVC Casement Window Styles?
Other UPVC casement window styles include the French casement window which is a more traditional take on the standard casement style.
How Can I Get Casement Window Prices?
You can get instant casement window prices by using our free online quoting engine or you can contact us on: 0800 015 5679 to speak to one of our advisors.
How Long Will It Take To Install My Casement Window?
Because every job is different, it is best your talk to your double glazing installer who will be able to give you an exact timescale.
If I Use Double Glazing on the Web Who Will Fit My Double Glazing?
Double Glazing on the Web have a fully accredited network of local installers. Once you have created your free online quote we will put you in touch with up to three reputable local suppliers. Each of these suppliers will offer you a free no obligation quote and who you choose is completely up to you.
What Colour Options are Available?
There is a wide range of colour options available including both standard and bespoke colours and finishes. Aluminium windows and doors even come available in a RAL colour chart which gives you an infinite choice.
Do UPVC Windows Need Trickle Vents?
Trickle vents are not a requirement, however they do offer additional ventilation without the need for opening your windows so can be a valued add on.
What Does UPVC Stand For?
UPVC is an abbreviation for unplasticised polyvinyl chloride which is used in window frames.
Do UPVC Windows Look Cheap?
UPVC windows do not look cheap. They can be designed to offer slim sightlines and come in a wide variety of colours and finishes, not just the standard white. Authentic woodgrain finishes are available to achieve more of classic look.
Do UPVC Windows Discolour?
Your UPVC window will never rot, rust, peel or flake due to its long lasting material. An occasional wipe clean is all that is required.
Are Double Glazed Windows Good For The Environment?
Once of the best ways of making your home more energy efficient is insulation. Double glazed windows act as another layer of insulation, helping to prevent the loss of valuable heat.
Are Double Glazed Windows Soundproof?
Double glazed windows are built to provide improved sound insulation. Double glazed windows are recommended for homes situated on busy roads or built up areas where external noise can be a problem.
How Much Do Windows Cost?
Window prices will depend on your specifications such as size, style, glass type and security locks. At Double Glazing on The Web you can get an instant window cost online using our online quoting engine. Simply choose your window style and enter your window measurements to receive a unique window price.
What Are Double Glazed Windows?
Double glazed windows feature two panes of glass for better heat insulation and noise reduction. Window frames come in a variety of materials such as UPVC, wood and aluminium. Double glazed windows also come in a choice of styles to suit your home, you can choose from a wide range of window designs which include the casement window, tilt and turn window, sash window, sash horn window and bay window.
What Happens if I Have a Problem with my Windows or Doors?
All of the double glazing installers in our network offer product guarantees. Provided you are still covered by your manufacturer's guarantee, all you need to do is contact the installer in question and they will either repair or replace your windows and doors.
Condensation on Double Glazed Windows
When moisture in the air suddenly cools and condenses on a cold window, you get condensation. Well insulated (Low E) double glazing will help prevent condensation from forming on the interior of your window. Replacement glass units or replacement double glazed windows are recommended for windows with condensation.
How Does Double Glazing Work?
Heat loss is greatly reduced using double glazing. Double glazing features two panes of glass with a layer of trapped air or gas in-between. Air is a poor conductor of heat so much less heat is lost through the window itself.
What is Double Glazing?
Double glazing is where windows have two layers of glass with air tight gap between them to reduce loss of heat as well as provide effective noise insulation.