How to replace the glass in a uPVC window?

It’s not too difficult to replace the glass in a uPVC window, so if you’re a confident DIYer you could have a go at this yourself. We’ll go through the main steps on how to replace the sealed unit in a uPVC double glazed window: Using a rubber mallet and a strong pallet knife, remove the beading around the window. You might think they’re part of the frame, but they’re actually separate on the inside of the frame and can be taken out by using pallet knife to prize them out. Start with one of the longest beads first and leave the top bead until last. Give the glass a little tap to loosen it if it doesn’t come out straight away, then the whole unit should slide out easily. Just make sure it falls towards you and not back out onto the ground below! Clear any debris that has found its way into the frame with a brush. Add spacers at the bottom of the frame – these could be pieces of plastic. Get your new sealed unit (make sure you measure the glass before you buy one so you know which size to get) and carefully take it out of the packaging. Look for the British Standard mark – that shows you the bottom of the glass. Lift the glass into the frame, starting with the bottom first, and make sure that it fits square in the frame before taking the spacers out. Use a little washing up liquid to spread along the beads to make it easier when you slide them back into the frame. If they simply push and clip back in, you can use something like a block of wood to help you push them in correctly. Put them back in reverse order to how you took them out. And there you go! If you’re feeling confident you can have a go at replacing the glass in your uPVC window yourself. But if you’ve got any worries, leave it to a window installer who will be able to do it in less than an hour.

Replacement Glass (Glazing) in Tower Hamlets

Discover Replacement Glass (Glazing) Prices in Tower Hamlets

Replacement Glass (Glazing) in Tower Hamlets

Are you searching for Glaziers in Tower Hamlets? Our network of glaziers can aid with your job. All of our Window Installer in Tower Hamlets are examined so you can see local testimonials, when business was founded, ratings, approval and rate enabling you to make the appropriate decision on who to employ. Allow us take the hassle out of discovering approximately 4 experts for your Glaziers project.

Glaziers cut, shape and also mount glass for a variety of factors including windows, showers and also mirrors. It's a very specialist profession as well as should not be attempted by an amateur.

Glaziers can be needed for both residential as well as industrial glass installations and whatever your glazing requires; you'll be able to find assistance from these qualified tradesmen.

Why would certainly I need a glazier?

Among the most preferred factors for requiring a glazier would certainly be to replace a wrecked window pane. Glaziers will certainly have the ability to cut and also shape the pane promptly as well as successfully to improve your house's security as well as relieve your mind.

We will give approximately 4 Glaziers pros locally, who will provide quotations for the work you desire done. You'll obtain a home visit from professionals in Tower Hamlets who'll assist you to choose the right Glaziers for your house prior to carrying out the installment. Enter your postcode to start browsing now.

Average Glaziers cost in Tower Hamlets

The regular cost of Glaziers is £75. Costs alter based on the materials and the business picked. The upper price range can be as high as £86.25. The material costs are in most cases approximately £18.75

Average price per Glaziers job in 2025

Avg. price low	Avg. price low £57
Avg. price	Avg. price £75
Avg. price high	Avg. price high £87

£200

£150

£100

£50

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Prices based on actual Glaziers costs for Tower Hamlets, as reported by local LeadsDoWork members.

Glaziers installation cost in Tower Hamlets 2025

	Labour cost	£53
	Material cost	£19
	Waste removal	£4

Time frame: 1 day

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Glaziers Projects in Tower Hamlets in February 2025

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Tower Hamlets

The London Borough of Tower Hamlets is a London borough towards the east of the City of London and north of the River Thames. Covering a total area of around 7.63 square miles, it is in the eastern part of London and covers a lot of the traditional East End. The London Borough of Hackney lies to the north of the borough whilst the River Lea forms the boundary with the London Borough of Newham in the east. On the other side of the Thames is the London Borough of Southwark towards the southwest, The London Borough of Lewisham towards the South, plus the Royal Borough of Greenwich to the southeast. The River Lea also forms the boundary between these parts of London historically in Middlesex, with those formerly in Essex.

Based on population estimates created in the middle of 2014, the borough has a permanent population of around 284015 people. Lots of the tallest buildings in London occupy the centre of the Isle of Dogs in the south of the borough.

The borough hosts the world headquarters of a lot of global financial firms, employing some of the highest paid workers in London. Moreover, a part of the Queen Elizabeth Olympic Park is in Tower Hamlets.

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hello, please could i have a quote for secondary glazing for three windows? the approximate dimensions are: 1. 1000mm x 1640mm (first floor rear) 2. 1000mm x 1300mm (first floor rear) 3. 1450mm x ...

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08 Sep

Windows | Glazing

London - E2

Enquiry from: Mustafa Z

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customer made an online enquiry for new double glazing. mr confirmed interest via /phone considering a range of options mr lives in london area 2+ windows supply and install please call to arrange ap...

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14 Apr

Windows | Glazing

London - E1

Enquiry from: K

Start Date: Immediate

Customer requires a replacement frame for door. Rented property with permission. Call back anytime. Type of window / door: Door Glass replacement only: No Number of windows requiring repair: 0 ...

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15 Mar

Windows | Glazing

London - E1W

Enquiry from: Diana M

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customer wants secondary glazing. call back anytime. type of window / door: window glass replacement only: yes number of windows requiring repair: 1 number of doors requiring repair: 0 other r...

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04 Mar

Windows | Glazing

London - E15

Enquiry from: OLUMIDE A

Start Date: Immediate

customer living in london area made an enquiry for double glazing quotes via one of our websites. customer confirmed interest via / sms at 18:29/ email at 18:29 mr needs advice on options 2+ windows ...

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22 Feb

Windows | Glazing

London - E4

Enquiry from: Emma B

Start Date: Immediate

one window for bathroom, with two openings, width 1340mm, height 1280. white, with white handle. to be fitted upstairs, access via flat roof.

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FAQs

It’s not too difficult to replace the glass in a uPVC window, so if you’re a confident DIYer you could have a go at this yourself. We’ll go through the main steps on how to replace the sealed unit in a uPVC double glazed window:

Using a rubber mallet and a strong pallet knife, remove the beading around the window. You might think they’re part of the frame, but they’re actually separate on the inside of the frame and can be taken out by using pallet knife to prize them out. Start with one of the longest beads first and leave the top bead until last.
Give the glass a little tap to loosen it if it doesn’t come out straight away, then the whole unit should slide out easily. Just make sure it falls towards you and not back out onto the ground below!
Clear any debris that has found its way into the frame with a brush. Add spacers at the bottom of the frame – these could be pieces of plastic.
Get your new sealed unit (make sure you measure the glass before you buy one so you know which size to get) and carefully take it out of the packaging. Look for the British Standard mark – that shows you the bottom of the glass.
Lift the glass into the frame, starting with the bottom first, and make sure that it fits square in the frame before taking the spacers out.
Use a little washing up liquid to spread along the beads to make it easier when you slide them back into the frame. If they simply push and clip back in, you can use something like a block of wood to help you push them in correctly. Put them back in reverse order to how you took them out.

And there you go! If you’re feeling confident you can have a go at replacing the glass in your uPVC window yourself. But if you’ve got any worries, leave it to a window installer who will be able to do it in less than an hour.

You can end up with a cracked glass window in a few ways. The most common one is when a rogue stone in the lawnmower hits the window or someone’s cricket or tennis game goes wrong and you end up with a ball through the window. Youi often end up with a ‘bullseye’ type crack that expands out from the point of impact. You can also get pressure and stress cracks from intense fluctuations in pressure and temperature. Unfortunately, there’s no way you can permanently fix cracked windows without replacing the entire sealed unit. An installer can replace a cracked glass window in less than an hour simply by taking out the sealed unit (the two panes of glass in double glazed windows) and replacing it with a new one. It costs an average of £110, but you could try to do it yourself for around £55. But what if you can’t get an installer to fix your window straight away? There is a DIY method you could try. As a temporary fix for your glass window, you can use a solvent-based adhesive like epoxy which will keep the glass intact and prevent further damage. You’ll also need:

Washing up liquid
Glass cleaner
A lint-free cloth or rag
A putty knife
A paper plate
Acetone

First, you’ll want to clean the glass using the washing up liquid and a damp cloth to remove any dust or oils. Leave it for a few minutes to dry, then create a mixture of epoxy by combining the hardener and the resin and stirring it on a paper plate. Using the putty knife, spread the mixture on the cracks, making sure you press gently to fill them. Leave it for at least 5 minutes to dry, then get rid of any excess by using some acetone on a dry cloth. Clean the window using some glass cleaner and another dry cloth, and you should have a temporary fix!

Accidents happen, and sometimes windows get broken. And that will lead to you wanting to replace just the glass in your window, rather than the whole frame. Also, as windows get older they can mist up on the inside, which means that the unit has ‘blown’ - so you’ll also need to replace the glass. But how much is it to replace the glass in a window? Luckily, if the frame of your window is in good condition, there’s no need to replace it, and this will reduce the cost. For an installer to fit a new pane of glass in a single glazed window, the average cost is £100, while a replacement double glazed sealed unit will cost an average of £110. Of course, as this is an average, if your window is very large you may spend more, and if your window is very small the price may be less. That's why it’s important to get a range of quotes so you can compare costs and get the best price. If you’re good at DIY, you may feel confident enough to have a go at replacing the glass in your window yourself. In that case, the cost of sealed unit and any other materials you need will cost an average of £57. It’s a significant saving, and if you think you can do it, then give it a try. However, if you’re in any way unsure, it’s best to leave it to the professionals. A window installer will be able to replace the glass in your window in less than an hour. Even though it costs more for a professional to do it, if you get it wrong and have to start over it will cost you more in the long run.

You can only repair blown double glazed windows in the sense that you can replace the sealed unit (the glass part of the window) instead of having to replace the entire window.

When a double glazed window is blown, it means that the seal around the window has failed and is now letting air in and out. Often the first sign that the sealed unit has blown is condensation on the inside of the window, which is annoying since there’s no way to get rid of it! When your sealed unit has blown, you’ll be losing heat out of the window, meaning you could be spending more on your energy bills.

As a temporary fix, you could see if you can buy a misting repair kit online, but the condensation will eventually occur again as the air gets in. The best thing to do is ask a window installer or glazier to replace the sealed unit for you.

It's simple to replace the glass in a window – the specialist will remove the beading around the window, remove the blown glass from your window frame and set it to one side. They will then clean up around the frame before adding spacers in, then fitting the new sealed unit into the frame. They’ll make sure it’s a snug fit before replacing the beading back around the window to secure it.

There's no reason to put off repairing a blown double glazed window since the cost is generally much less than replacing the entire thing. A sealed unit with installation costs an average of £100, whereas a completely new window will cost around £400. You’ll soon notice that it’s less draughty and will be able see out of your window once you’ve had the blown glass replaced.

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Customer Reviews

Overall rating:

Tower Hamlets Glaziers installers are rated 5 out of 5 based on 2 reviews of 18 pros.

The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with Glaziers projects that have been connected with Glaziers pros to help them. All Glaziers contractors All Tower Hamlets Glaziers contractors

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