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Knowing the Cost to Fit Double Glazed Windows

This article will provide you helpful information about fitting double glazed windows, including the cost, materials, labor and turnaround time of this home improvement project.

Today, double glazed windows are the most popular windows. It has various benefits to offer homeowners who look forward to undergoing home improvement projects. So if you are thinking of changing your old windows, then the double glazed windows could be your perfect window replacement choice.

First Things First: Learning the Basics of Double Glazing

Double glazed windows have 3 main parts. These are the glass, the frame, and the seal. Altogether, they make a fashion-driven type of window that’s also very beneficial. To begin with the installation, a window fitter will remove your current windows. This is a critical procedure since the installer needs to make sure that he doesn’t damage the brickwork or damp course.

It’s the same for a full house installation. Then, after safely installing the glazed window or windows, a thorough and complete checkup of the double glazing job is needed. This is a necessary step to make sure that everything is sealed and is functioning correctly. Most importantly, the installer will demonstrate and show you that standard ventilation is secured.

A double glazed window has two sheets of glass with a gap in-between. The gap will create an insulating barrier that will keep the heat in. Sometimes this gap is filled with gas to make the window even more energy-efficient.

However, this procedure will add up to the overall cost. Now, to identify how well a double glazed window can stop the heat from escaping through it, check the materials used including the style and overall performance rating. For some windows, they are rated by how effectively they can reduce noise from the outside and block sunlight.

What Are the Benefits of Double Glazing?

Here are some of the many benefits of double glazing:

  •         Better insulation.
  •         Reduced energy bills.
  •         Noise reduction.
  •         Smaller carbon footprint.
  •         Increased security.
  •         Reduced heat loss through windows.
  •         Reduction in draughts or cold spots.
  •         Less condensation build-up that prevents interior damage.
  •         Increase your property’s EPC rating.
  •         Adds the resale value of your home.
  •         Eco-friendly.

Double Glazing as An Investment: True or False?

 Double glazing is a good long term investment for several reasons. The costs and potential savings for this type of window are high. Just imagine how cost-efficient it can be as it can last for 20 years or more. Double glazed windows can withstand all types of climates plus maintaining a comfortable temperature inside your home.

These windows are energy-efficient as well. It will let you save money on heating and cooling. Also, selling your house in the future will be easier. With no doubt, this window type can offer you a more comfy and secure home.  

The Double Glazing Window Replacement Industry in the UK

 The UK shows aggressive sales tactics and cold calling performance in their double glazing window industry. Unfortunately, it gives them a terrible reputation. Why? Many of their double glazing companies use high-pressure sales tactics like visiting your property lasting several hours. That is unappealing to most homeowners because it’s a waste of time. 

Another example of high-pressure closing tactic is to initially offer a homeowner high priced double glazed windows then suddenly offer a huge discount for obviously just invented reasons. Insincere sales simply mean unreliable sales. One more example of worse sales scenarios is when a salesman lets you agree to sign the sales contract right there and then not giving you the time to compare with other quotes.

All these dodgy sales tactics aren’t selling. Instead, it weakens the potential of these amazing windows to be sold.

How to Buy Wisely?

So what can you do if you are faced with this kind of sales situation? Stand firm to what is right. Take your time and never sign anything straight away. Ignore all these hard-sell tactics and do more research.

Don’t forget to compare with other companies before picking the right window fitter for you. Be clear to the salesman that you are there to canvas prices and not to buy yet. Making an instant decision is simply being ripped off by these salespeople who just want to sell and earn your hard-earned money.

Opt for a Professional Installation

Double glazing is not a DIY job. Things can go wrong if you choose an incompetent and inexperienced fitter to work on your windows. Even if you bought the best quality double glazed windows, poor quality installation can make these windows very prone to damage. Hiring the wrong fitter can lead to the following situations:

  •         Condensation problems between the panes.
  •         Draught because the seals around the windows are not installed correctly.
  •         Leaking during bad weather.

 When paying for the services, do not pay in full right away. Paying a small deposit amount is always a standard practice to make sure that the project will be finished according to your expectations and will guarantee you 100% satisfaction.

How to Deal with Condensation

Condensation within double glazed windows is a very common occurrence. It is a major irritation for this type of window. When the seal around the two glass panes starts to degrade, it will allow moist air to get into the air gap.

This moist air will then form condensation inside the double-glazed unit. Then, there will be reduced thermal insulation within the window property that cause dirt-like substances on the window.

 It is therefore important to choose high-quality windows because the uPVC frames themselves can crack anytime and will allow moisture inside. Although this is much less common, it happens and can be prevented.

Condensation can be avoided in several ways. First, regularly check the seals around your windows to make sure that there are no failures. If you see gaps, then you might need to get the seal replaced. It’s better than a full new window replacement that can cost £50 up to £150.

Listed Buildings

If your house is included in the listed buildings or is within a conservation area, you need to seek advice from your local planning authority before making any changes to the structure or external appearance of the property. Most probably, a building consent may be required before carrying out any work. If you have historic windows, the repair or replacement may not be easy.

Unless those are non-historic windows, they will likely be approved faster. Why? Since non-historic windows are not of any interest. Changing your windows will require you to comply with Building Regulations specifically under the minimum energy efficiency requirement.

Double Glazing for Sash Windows

A slash window is made of one or more movable panels or the so-called ‘sashes’. It needs a frame to hold panes of glass that are usually separated from each other. The gap is made possible by glazing bars or more popularly known as ‘muntins’ in the US. In the UK, there are numerous homes with old and draughty wooden sash windows. If you are one of them and you’re thinking of either replacing or draught-proofing your current windows, we are here to help you decide.

Draught proofing is one way of improving the efficiency of your windows without spending much. It is a cost-effective method and is particularly suited to sash windows. Now, sash windows are more prone to droughts. It is important to create an airtight seal around the frame of each window. This will ensure that there is proper fitting of secondary glazing on the inside.

But the situation could be different if the wood is already rotten and crumbling. In that case, you need to consider a full restoration or window replacement project. The cost of refurbishing your existing window is around £200 per unit while it will cost you over £1000 for a modern double glazed wooden sash window. Plus, that comes with uPVC windows that the price is around £750.

Double Glazing for Bay Windows

Bay windows or also called ‘bow’ windows are one of the most popular types of windows today. They can be rectangular, polygonal, or arc-shaped. This type of window projects outward from the main walls of a building forming a bay in a room. To make up the bay, the windows are placed at an angle of commonly at 90, 135 or 150 degrees. If you are after an improved aesthetics and enhanced view of your home, bay windows could be the best option.

Just like the conventional windows, the bay is constructed from materials like aluminum, wood or uPVC. The only disadvantage of bay windows is the fact that they are difficult to build and install, plus they are more costly. Expect to pay an amount starting from £2,000 up to £8,000. That’s for a new bay window supplied and fitted. But that would still depend on the frame material, overall size and the type of glazing used.

Your Alternatives to Double Glazing

When it comes to replacing your windows, you have a lot of choices. Two of the most popular options are triple glazing and secondary glazing. Now, here’s a comparison between the two to help you decide which type of window is best for you.

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Double Glazing vs Triple Glazing

Although adding an extra pane of glass into a double glazed window means an addition to the cost, considering that it can improve the thermal efficiency and noise reduction is still an advantage. Double glazing windows can already adequately perform when it comes to providing a warmer surrounding inside the house.

But triple glazing can add slightly more heat from 1-2 degrees warmer around the windows. That’s a good factor to make sure the rest of the house is well insulated. Especially if you live in a particularly cold climate, triple glazing can be a better choice.

Double Glazing vs Secondary Glazing

Installing double glazed windows is more expensive. Several reasons that affect the cost are the following:

  1. Installing double glazed windows will require an installer to fit entirely new windows while secondary glazing installation can be done by retrofitting the second sheet of glass to the inside of the existing single glazing.
  2. Using DIY kits for secondary glazing is possible while you will need an expert installer for the double glazing job.
  3. There’s a relatively slow payback on uPVC double-glazing units as it could take up to 20 years. While secondary glazing could provide you a return on investment for just a few years.

When it comes to reducing energy bills, both double-glazing and secondary glazing are cost-effective. But double-glazing is proven to be more effective in stopping heat to escape. When it comes to reducing noise pollution, these two types of windows are also doing a great job.

Given all the comparisons and similarities, many homeowners still prefer double glazing as it can give a neater and simpler look from the inside.

Building Regulations Regarding Double Glazing

In 2002, all double glazing projects should adhere to the building regulations such as covering thermal performance, fire safety, means of escape and ventilation. These directions under ‘controlled fitting’ regulation require every window replacement project to meet standards. It also includes external windows and doors.

As the project owner, you are required to hire and use the services of a registered installer. These are professional individuals with proper certifications who can comply with building regulations. Unlike an uncertified installer, a licensed laborer can execute the job without having to pay the local authority building control to do an inspection and afterward issue a certificate.

Most importantly, using an unregistered installer will make you responsible for seeking approval from your Local Authority plus the need to seek advice from an approved inspector who can check the work for compliance.

The Importance of Industry Accreditations in Double Glazing Projects

For you to have the peace of mind, choose a double glazing company that is accredited and recognized by the official accreditation offices. The three main national organizations that are responsible for checking double glazing installers are the following:

  1. The Glass and Glazing Federation – makes sure that every window replacement project upholds and increases quality standards. The installers under this organization are fully trained in the latest advances in the industry and are required to use only top quality products.
  2. Competent Person Scheme – aims to make the process easier by allowing registered and qualified installers to self-certify installations. There will be no need to submit a building notice nor seek approval from an inspector.
  3. Fenestration Self-Assessment Scheme – this accreditation company ensures that new double glazing installations comply with the highest industry standards for thermal performance. They also require their installers to make sure that all legal requirements are being met.

The Cost to Fit Double Glazed Windows

For a whole property semi-detached house with eight windows and two doors, the average cost to fit double glazed windows is around £3000 to £4000. This given estimated price will vary depending on the location, current window type, the number of windows, quality of glass, amount of openings, type of window locks, and any scaffolding costs involved.

Double glazed windows are very popular today and for many good reasons, you must pursue your plan. No more hesitations. Hire the best double glazing fitter now!