Double Glazing Cost: How Much Is Double Glazing?

Want to know how much double glazed windows cost?

On average, the cost of fitting new double glazed windows is £4,500. This cost will vary depending on various factors, from the type of window you're having installed to the amount of windows, all the way to your geographical location and ease of access.

To help you budget, we'll look at everything you need to know so you can make an informed decision when it comes to replacing your home's windows.

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Double Glazing Cost Calculator including Installation

How Much Does Double Glazing Cost?

Need help calculating the cost of double glazed windows?

If you want personalised costs, try using our double glazing cost calculator above. If you want a general idea, let's look at the standard supply-only prices per window:

• £100 for a small uPVC window.
• £200 for a medium uPVC window.
• £300 for a large uPVC window.

It’s important to note these prices are for standard uPVC casement windows. The price of new windows can easily double or triple simply by opting for a non-white colour, by adding multiple openings, or choosing sliding sash windows.

For bow or bay double glazed windows, the price varies depending on the number of panes you have. And, if you're thinking about installing a skylight, the cost of a Velux window can reach upwards of £3,000.

Double glazing prices can vary significantly based on the type and material of the frames, as well as the number of windows in your home.

So, if you have 10 windows (8 large and 2 small), it will cost roughly £2,600 to supply them yourself, plus delivery. If you have your double glazing company supply the windows, then expect to pay more.

In terms of picking a decent window installer, the best advice is to make sure they are either FENSA (Fenestration Self-Assessment Scheme) or CERTASS certified. If the window installer does not come under one of these two bodies, then you should probably look elsewhere.

To easily find competent double glazing installers, you can use MyJobQuote. All you need to do is enter your details and then have up to three local window companies or joiners get in touch with you to discuss providing a quote and offer advice.

Double Glazed Windows Prices

When considering double glazing prices, it's important to factor in the type and material of the frames, the number of windows, and the installation process. Comparing prices for different materials like steel, timber, and aluminium can help you find the best deal.

Let's look at some costs for uPVC double glazed windows:

The more windows you have, the more replacement uPVC windows will cost. The size of the windows makes a difference, as does the type of opening and style of window, but the number of windows is the main factor in the price.

Double Glazed Window Labour Costs

So, how much does it cost to actually fit double glazed windows?

Double glazing fitters can charge different fees depending on a few factors.

Replacing and fitting a new double glazed unit takes around 45 minutes on average, with most companies able to carry out a whole house installation job in a day or two, with possibly an additional day required for applying trims and finishing touches.

Most tradesmen will normally charge a minimum of half a day's pay for any job, so keep this in mind for the smaller ones. Let’s say you’re replacing the double glazing in your whole house (12 windows) - how much will it cost to fit them?

It should take roughly 9 hours to install the windows, and maybe another hour or two for the trim and finishing. That gives us one and a half days of labour at roughly £150 per day, totalling an installation cost of around £450.

Finally, let’s not forget your old windows. You’ll need a large skip for them. Skips cost in the region of £150 to £300, and you can usually keep them for a month.

This brings your total cost for the double glazing units, the fitting, and the waste removal to around £3,500.

Remember: your location can cause the price to vary. Being closer to London means the average window fitter will charge more per day due to their increased living costs - there’s not really much to be done about it.

But, you can still be careful with who you hire. The best way to find reasonable rates is to get multiple quotes before selecting your double glazing installers.

What is Double Glazing?

Double glazing is a type of window insulation that involves fitting two glass panes separated by a small gap, typically filled with air or gas. This gap acts as a barrier, reducing heat transfer between the inside and outside of a building and minimising noise pollution.

Double glazing is an effective way to improve energy efficiency, reduce energy bills, and enhance the overall comfort of a home.

There are other types of glazing you can opt for:

• Secondary Glazing: Cheaper to install than new double glazing, secondary glazing is a good option for homeowners living in listed buildings where altering the external window appearance isn't an option, but they want to have some added thermal benefits. Secondary glazing costs between £250 to £500 per window.
• Triple Glazing: As the name suggests, triple glazing uses three panes of glass instead of the two seen in double glazing. Triple glazing costs anywhere from £2,000 to £5,000, depending on the number of windows and your chosen style.

Types of Double Glazed Windows

There are several types of double glazed windows available, each with its unique characteristics and benefits.

Some of the most common types include:

• Casement Windows: These windows open on a side hinge and are known for their energy efficiency and durability. Casement windows are a popular choice for many homeowners due to their ease of use and ability to provide excellent ventilation.
• Sash Windows: These windows have two framed panels that slide up and down over each other, providing excellent ventilation and aesthetic appeal. Sash windows are often found in older homes and are valued for their classic look.
• Tilt and Turn Windows: These windows can be securely left open for ventilation by tilting them inwards while remaining fully locked. Tilt and turn windows offer versatility and are ideal for modern homes.
• Bay Windows: These windows extend out from the room and require three windows instead of one, providing a unique architectural feature and increased natural light. Bay windows can make a room feel larger and more inviting.
• Sliding Sash Windows: These windows have a horizontal sliding sash and are known for their ease of use and energy efficiency. Sliding sash windows are a great option for spaces where you want to maximise the view and natural light.

Other types of materials can also be used for double glazing window frames, including aluminium double glazed windows and timber, but uPVC offers better value for money, being considerably cheaper.

Another advantage of uPVC is the low maintenance requirement - all you need do is wipe it down with a damp cloth every now and then, and that’s it! uPVC never rots, flakes or rusts, being one of the most durable of the materials available for window frames.

Insulation is another area where uPVC material beats the more expensive aluminium frames. uPVC is a very good insulator, and only timber frames provide slightly better insulation properties (but at a much higher price).

Double Glazing — Things to Consider

New double glazed windows can liven up the appearance of your home while adding value and appeal to your property. New windows also increase insulation levels, making your home more energy-efficient and comfortable while reducing your bills.

Double glazed uPVC windows are highly weather resistant, and the materials are environmentally friendly and recyclable. They require very little maintenance, with the exception of cleaning them with a damp cloth every so often, and they remain looking good for many years with only a slight discolouration over time.

Unlike wood, uPVC won’t change shape or warp over time and will keep its basic structure until the end of its lifespan (which could be 30 years or more).

But on the downside, some think that uPVC windows look ugly and boring! Another criticism is that uPVC windows are cheap for a reason – they look cheap! Plus, although uPVC can be recycled, it’s actually hazardous to the environment when the window frame is initially created and of course, it is made from an unsustainable resource.

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DIY Double Glazed Window Installation

The cost of replacing a blown double glazed window is between £55 and £195, depending on the size of the window. FENSA registration is required to fit new double glazed windows and replacement double glazing doors in the UK.

However, the basic process of fitting windows is reasonably straightforward for a decent DIY enthusiast. Double-glazing comprises the frame, the sill and the glazing unit. When you order uPVC windows from the manufacturer, they usually arrive separately in parts, with the beads in the frame.

When you remove your old windows, it is critical that you do so carefully, as the more of a mess you make of the walls and plaster, the more work you will have later making it good! Be especially careful with damp-proof courses and ensure that they have not been pulled out with the old window frame.

If they have been moved or damaged accidentally, you need to replace or refit them properly. Then, simply fit the new windows in place using bolts and then seal carefully around the edges of the frames.

Does Double Glazing Add Value to a House?

Yes, double glazing can add significant value to a house. According to various studies, installing double glazing can increase the value of a property by up to 10%. This is because double glazing provides numerous benefits, including:

• Improved energy efficiency: Double glazing can reduce energy bills and minimise heat loss, making a home more attractive to potential buyers. Energy-efficient homes are increasingly in demand as people look to reduce their carbon footprint and save on utility costs.
• Enhanced aesthetic appeal: Double glazing can improve the overall appearance of a home, making it more desirable to potential buyers. Modern double glazed windows come in various styles and finishes, allowing homeowners to choose options that complement their home’s design.
• Increased security: Double glazing provides an additional layer of security, making a home more attractive to potential buyers. The robust construction of double glazed windows makes them harder to break, offering homeowners peace of mind.
• Reduced noise pollution: Double glazing can minimise noise pollution, making a home more comfortable and desirable to potential buyers. This is particularly beneficial for homes located in busy or noisy areas.
• Easy maintenance and long lifespan: uPVC windows are easy to maintain and clean, and have a lifespan of around 20 years

Overall, double glazing is a valuable investment that can add significant value to a house, making it more attractive to potential buyers and increasing its resale value.

Checklist: How To Hire a Window Fitter in the UK

Take a look at our easy step-by-step guide when seeking a professional window fitter to replace your uPVC windows:

• Gather at least 3 quotes from different local window fitters, using MyJobQuote to find trusted professionals.
• Ask for written quotes with itemised cost breakdowns to avoid any hidden fees.
• Ensure your window fitter is either FENSA or CERTASS certified - if they're not, keep searching for a suitable trader.
• Check to see what type of insurance the window fitter has, and if they'll take care of any waste removal generated during the project.
• Be sure to ask about the window fitting process, finding out if you need to leave the property or make any adjustments while the work is happening.

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Sources

https://www.planningportal.co.uk/permission/common-projects/energy-saving/glazing