We understand that when looking for double glazing windows for your home improvements, things can be confusing and full of jargon. This makes it hard for the average customer to know where to go. In the article below, we’ll look at your range of options with double glazing, including the styles and materials on offer.

Here at Double Glazing on the Web, we aim to be a comprehensive online hub, linking customers with approved suppliers and installers of double glazing. We also aim to offer helpful advice, news and resources about double glazing windows so that you have you the whole package at your fingertips.

What are Double Glazing Windows?

Double glazing and double glazing windows are terms that are thrown about a lot in the home improvement industry. This is in the assumption that as an established product, everyone knows what it is – but that isn’t always the case. Available with any home renovation that includes prominent glass panels, double glazing is, in short, two panes of insulated glass within the single frame.

This, in turn, offers a much higher level of security and energy efficiency than older, outdated single pane glass panels. As a result, double glazing, especially in windows but in all products, is incredibly popular. Improved energy efficiency means that in time you could save money on energy bills, as less heat will escape through the insulated glass.

Double Glazing Windows

Double Glazing Windows & Styles

In today’s market, double glazing windows aren’t just exclusive to modern frames. Double glazing is generally available will every type of window frame. Whether you’re looking for something more complex, or even a more traditional frame, there’s something for you.

Here’s just a snippet of the double glazing window options you could invest in with one of our approved installers:

Casement windows

Casement windows are seen in the industry as the most popular and standard choice of double glazing window on the market. As with every frame, they deliver excellent thermal efficiency and are a robust, secure choice of home improvement.

In several instances, they offer the most configuration and customisation options, which in turn makes them a highly versatile option among double glazing window styles. They are often available in a vast range of styles, which in turn means they can suit just about any property.

Flush Casement Windows

Similar to the ever popular casement style, flush casement double glazing windows offer a touch of class wherever they are fitted. If that’s what you’re looking for with your home renovations, they could be the choice for you. They are one of the most visually appealing window frames when shopping for home refurbishments.

Flush casement frames are seen as a modernisation of older wooden windows, offering a similar style but instead made from sturdy uPVC. However, unlike the older frames, the double glazing windows will provide better heat retention, soundproofing and weatherproofing.

Sliding Sash Windows

Investing in new double glazing windows doesn’t mean you have to totally modernise your home. In fact, there are options that will allow you to maintain the appeal of an older property and sliding sash windows are one of them.

Often built to replicate the older frames perfectly, several installers will offer sliding sash windows in a range of timber finishes, to better mimic the traditional appeal. However, with the inclusion of modern double glazing, they’ll offer brilliant heat retention among other perks.

French Windows

Double glazed French windows are exactly what they sound like – a windowed version of your typical French door. These are a stunning option for garden facing kitchens, as the removal of any central reinforcement allows plenty of natural light to enter the home.

However, with the inclusion of double glazing, you won’t have any concerns over the level of security you’re getting with the window itself. It will do well to protect against the worst. Double glazed windows are also incredibly weatherproof, meaning the rain and wind will stay outside as well.

Tilt & Turn Windows

Tilt & turn windows are an impressively functional style of double glazing window, as they can double up as an emergency exit in a worst case scenario. This can offer you peace of mind, especially if your home has hard to access areas that could easily be cut off.

As a result, tilt & turn windows come with complex integrated hardware, but that doesn’t mean they’re partial to breaking. In fact, many installers will offer guarantees for the quality of their double glazed windows. Tilt & turn frames also often require limited maintenance after installation too.

Bow & Bay Windows

Another style of window that is re-worked off of a more traditional look, bow & bay windows have a range of modern benefits for homeowners. First and foremost, they offer the illusion of more space, by making the room seem much more open. They are an excellent option for bedrooms and lounges.

You’ll often see these windows in period homes but those dated frames will have cold spots, and if they’re made from old wood, they may have also rotted too. With many of the installers on our site, you’ll get a uPVC bow & bay window which comes with as much as a ten year guarantee for its quality.

Double Glazing Windows Prices

Double Glazed Window Materials

When looking to invest in new double glazed windows, you have more choice than just the style of the frame. You’ll also be left with the choice of material with many styles as well.

uPVC Double Glazing Windows

With double glazing windows, uPVC remains the country’s most popular choice of frame material, thanks to a range of benefits and unrivalled versatility. uPVC, or Unplasticized polyvinyl chloride if you’re interested, is an incredibly robust material and therefore it’s used across a range of home improvements.

You’ll also find double glazed doors and conservatories which are made from uPVC, proving its rigidity whether it’s used in small or large quantities. It’s especially useful with the manufacturing of windows. This is because it can be made to fit the range of styles mentioned above, and to fit any space you may have available.

uPVC is a cheap material to manufacture too, meaning they’re a fantastic option if you’re shopping for double glazing on a budget. Despite this, they will not wither away easily and will provide great longevity. Contrary to what many believe, uPVC also isn’t a toxic material unless heated way beyond what it would naturally experience. All in all, it’s a fantastic choice of material for double glazing windows.

Aluminium Double Glazing Windows

However, uPVC is not your only option when in the market for some new double glazing windows. In fact, it has some serious competition.

Aluminium products are all the rage right now, thanks to being both lightweight, and incredibly sturdy. Both qualities make for a great material when building double glazing windows. Their longevity as a product can – in some instances – exceed their uPVC counterparts. Several suppliers will rubber stamp their aluminium products with as much as a 20 year guarantee.

As the material becomes more and more popular among installer and customer alike, the range of aluminium styles you can get with double glazing windows has grown also. With most of the window options mentioned above, you can instead get them made from aluminium.

With this option you’ll get slimmer frames which allows more natural light to enter the home, making the most of the stunning double glazing. Aluminium frames also require very little maintenance after installation. Although they’re a pricier option in comparison to uPVC, many consider them the superior product.

Replacement Double Glazing Windows & Options

If you’re interested in replacing the glass in your windows but not changing the frame itself, you still have plenty of options. Many of the approved installers on our site will offer replacement glass services if your current glazing is outdated and subpar.

Naturally, if the frame itself is wasting away, then your installer may recommend an entirely new window. But if it’s in good condition then replacing the glass may be the smarter option. It can come out cheaper, and with the perks of double glazing windows, they could actually save you money in the long run.

Double Glazing Windows, Costs & Prices 2018

Naturally, it’s tough to give an exact price for double glazing windows because of the range of variables – size, style and material all play a part in increasing and decreasing the rough estimate.

For example, a uPVC casement with one opener would cost between £250 and £450 dependent on size. However, it’s good to remember that local and national installers way offer differencing price ranges. Meanwhile, a sash window with double glazing in the same size range would instead be around £525-950.

A range of our installers will offer some of their more traditional frames in woodgrain finishes, to again better replicate the look of the classic models. These, among other colour options, come at a premium. A woodgrain finish would cost around £100 more each per window.

Finally, however, it’s important to know that many installers will offer deals when multiple windows are built and installed within the same renovation. This means that if you’re investing in five or six windows, your quote may come out less than expected.

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.

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