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Verified ProOver 50 Reviews

Britelite Windows

156 review(s)
Offers services in ISLINGTON
We fit high quality double glazing and the next generation triple glazing, using only the best materials. Fully guaranteed...
Verified ProOver 50 Reviews

Crystal Windows and Doors

64 review(s)
Offers services in ISLINGTON
Crystal is a uPVC Windows and Double Glazing manufacturer and installer. We have built a strong reputation in London and t...
Verified Pro

Haas Home Extensions Group

0 review(s)
Offers services in ISLINGTON
Welcome to Haas Extension Group, where we take pride in being the premier suppliers, installers, and design consultants of...
Verified Pro

Jassi Builders

2 review(s)
Offers services in ISLINGTON
Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I hav...
Verified Pro

Lewes MB

0 review(s)
Offers services in ISLINGTON
All aspects of windows, door and conservatory industry undertaken. Repairs or installations.

Recent Window Installer Enquiries

20 Jun

Windows | uPVC

London - N1

Enquiry from: Kirk B

Start Date: Immediate

Customer in London area made an enquiry for double glazing online. 2+ windows Supply and install Please call to arrange an appointment to discuss options

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25 May

Windows | uPVC

London - N1

Enquiry from: Jean L

Start Date: Immediate

Customer is looking to replace their windows. They are still considering options so please call to discuss what would be best for their home. Homeowner lives in London area 2+ windows Supply and insta...

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05 May

Windows | uPVC

London - E8

Enquiry from: Lydia W

Start Date: Immediate

Customer made an enquiry for replacement double glazing via one of our websites. Looking at various options Confirmed interest 2+ windows Supply and install Please call to discuss options and arrange ...

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30 Apr

Windows | uPVC

London - E8

Enquiry from: Ben S

Start Date: Immediate

Customer made an online enquiry for new double glazing. Homeowner confirmed interest via /phone Considering a range of options Homeowner lives in London area 2+ windows Supply and install Please call ...

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28 Apr

Windows | uPVC

London - N1

Enquiry from: Dean F

Start Date: Immediate

Customer is looking to have new windows installed. They are unsure of options so would like to discuss. Confirmed interest via Customer lives in London area 2+ windows Supply and install Please call ...

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28 Apr

Windows | uPVC

London - N1

Enquiry from: Mamie L

Start Date: Immediate

Customer made an enquiry for replacement double glazing via one of our websites. Looking at various options Confirmed interest 2+ windows Supply and install Please call to discuss options and arr...

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10 Apr

Windows | uPVC

London - N1

Enquiry from: Tekie T

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

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10 Apr

Windows | uPVC

London - E8

Enquiry from: Maureen D

Start Date: Immediate

Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in London area and is considering a range of options for their home. 2+ windows Supply...

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05 Apr

Windows | uPVC

London - E8

Enquiry from: Grace S

Start Date: Immediate

Customer is looking to have new windows installed. They are unsure of options so would like to discuss. Confirmed interest via Customer lives in London area 2+ windows Supply and install Please call ...

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02 Apr

Windows | uPVC

London - N1

Enquiry from: Kirsty W

Start Date: Immediate

What best describes your living situation? - Homeowner - Sole. How many windows are you considering replacing? - 2. What material do you require, UPVC? - 2. What colour do you want them to be? - -. Do...

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06 Mar

Windows | uPVC

London - N15

Enquiry from: Dalece P

Start Date: Immediate

What best describes your living situation? - Homeowner - Sole. How many windows are you considering replacing? - 2. What material do you require, UPVC? - upvc. What colour do you want them to be? - wh...

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24 Feb

Windows | uPVC

London - N15

Enquiry from: Dalece P

Start Date: Immediate

What best describes your living situation? - Homeowner - Sole. How many windows are you considering replacing? - 2. What material do you require, UPVC? - upvc. What colour do you want them to be? - wh...

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22 Jan

Windows | uPVC

London - N1

Enquiry from: Sarah T

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

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20 Jan

Windows | Glazing

London - E8

Enquiry from: Nicolas W

Start Date: Immediate

Customer is interested in secondary glazing for 2 windows. Call back anytime. Type of window / door: Windows Glass replacement only: No Number of windows requiring repair: 2 Number of doors req...

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13 Jan

Windows | uPVC

London - E8

Enquiry from: Reyhan T

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

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03 Jan

Windows | uPVC

London - E8

Enquiry from: Grace C

Start Date: Immediate

What best describes your living situation? - Homeowner - Sole. Are you the home owner of that property? - employed. How many windows are you considering replacing? - 6. What material do you require, U...

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17 Dec

Windows | uPVC

London - N16

Enquiry from: Janet W

Start Date: Immediate

Call anytime. Number of windows: 4 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.

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16 Dec

Windows | Wooden

London - N16

Enquiry from: Gordon L

Start Date: Immediate

Are you the home owner of that property? - yes. How many windows are you considering replacing? - 3. What material do you require, Wood ? - yes conservation area. What colour do you want them to be? -...

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11 Dec

Windows | Wooden

London - N1

Enquiry from: Giampiero B

Start Date: Immediate

Are you the home owner of that property? - yes. How many windows are you considering replacing? - 4. What material do you require, Wood ? - yes . What colour do you want them to be? - -. Do you requir...

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10 Dec

Windows | uPVC

London - E8

Enquiry from: Raphi T

Start Date: Immediate

are you the home owner of that property? - yes-joint. how many windows are you considering replacing? - 4. what material do you require, upvc? - upvc. what colour do you want them to be? - brown. do y...

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How much do Window Installer services cost?

How much do Window Installers cost? Prices for Window Installers in 2025 can differ relying on the kind of task that you require to have performed in your house. It's the inquiry we get asked a whole lot "how much do Window Installers charge?". It's generally very good to have an idea of how much a Window Installer are going to likely charge for their services. Prices will probably rise and fall based upon the products and also the tradesman selected. The table reveals the sorts of service that Window Installers typically do and also the typical cost range of these jobs. Some tasks take longer to complete than others so prices do fluctuate by task.

View our Window Installer cost guide View our Window Installer advice

The average price
of a Window Installer in Islington is:

£1,977

Window Installer job Window Installer cost in 2025
Double glazing in Islington £1,050-£3,500
Upvc double glazing units only in Islington £800-£1,200
Triple glazing in Islington £1,050-£3,500
Aluminium windows in Islington £1,338-£3,188
Wooden window in Islington £3,750-£5,750
Aluminium windows supply only in Islington £2,600-£3,900
Upvc or wood porch in Islington £2,625-£4,025
Sash window in Islington £1,200-£4,000
Glaziers in Islington £57-£87
Secondary glazing in Islington £1,050-£3,500
uPVC Single Window in Islington £225-£345
Wooden sash windows in Islington £3,750-£5,750
Wooden windows supply only in Islington £2,760-£4,140
Aluminium repair in Islington £240-£360
Window repair in Islington £268-£402
Wooden window repair in Islington £320-£480

Related Window Installer searches in Islington

Window Installer FAQs

How long do double glazed sealed units last?
When it comes to how long double glazed sealed units (the glass inside the window) last, a lot of it is down to the quality of the glass and the environment that your windows sit in. It’s not uncommon for your window frames themselves (especially if they are uPVC) to last longer than your sealed units. Sealed units are called that because they’re two panes of glass sealed together with an air gap in between. They use what’s called a ‘perimeter seal’ to protect the air gap between the panes, and is usually made of butyl mastic which retains a desiccant within a perforated metallic spacer bar. The desiccant’s job is to absorb any moisture which finds its way into the air gap to stop your window from misting up on the inside. When a sealed unit fails, or is ‘blown’, it’s usually because moisture builds up around the seal and causes it to fail. Sealed units won’t last forever, so you will eventually end up with condensation inside the panes of your double glazing, but in an ideal environment your double glazed sealed units could last up to 30 years, with some manufacturers claiming as long as 40 years. But they do require a bit of maintenance and the position of your windows will also make a difference as to how long they last. There are a few things that determine how long a sealed unit will last:
  • Climate - If your window faces south, it will be subject to direct sunlight for a lot of the day. This tends to cause the sealed unit to fail more quickly – a south-facing window may last between 10-25 years. This is because the spacer bars will twist as the temperature rises and causes the adhesive holding them together to eventually fail.
  • Moisture - Windows in kitchens and bathrooms tend to fail more quickly because they come into contact with moisture more often. For example, if water gets on your windowsill when you shower, the seal around the glass will come loose more quickly if it’s constantly wet.
When you replace the sealed units in your windows or get completely new double glazing, make sure you choose an installer that uses quality products and will take all the steps to ensure that your sealed units are kept away from moisture as much as possible.
Will a new double glazed window look different to existing ones?

It depends on a few factors whether a new double glazed window will look different to existing ones. If your existing windows are very old, perhaps 10 years or more, then it’s likely that there will be some small differences.

The first thing to remember is that your double glazing is exposed to the elements as soon as it’s installed. So over time, unless you’re very good at cleaning and maintaining your windows, they’re likely to look a bit dirty. Window frames that are south-facing may also become slightly discoloured from the sun, so if you install a new window right next to it you might notice a difference.

Also, there have been lots of technical advances in windows over the years. If your existing windows are significantly older, you might notice a difference in the handles on openers, and if your existing windows were installed before 2010 they might not have trickle vents, which is an extra strip on the inside of your window to keep air flowing through your home. While it’s not a legal requirement for replacement windows to have trickle vents if the original one didn’t, it’s a good idea to have them installed as they help prevent condensation and mould.

The only truly noticeably different elements to a new double glazed window compared with existing ones are likely to be on the inside, which might not be a problem for you if you only have one window in a room. However, if you know the brand of your existing windows, you can ask your window installer if they can source the same ones. Even if they’ve been updated slightly, the difference should be minimal.

What happens if I have problems with my new windows?

Ultimately the double glazing company you use is responsible for the quality of work and to ensure your windows are of an excellent standard. This is why it’s important to get a warranty and use a Fensa registered installer. If problems emerge within a couple of years then it’s likely the installation was of a poor standard.Contact the double glazing company and have the issue repaired or new windows replaced. This doesn’t matter if you received a discount of free windows as part of the deal. As long as you entered into a contract the company is obliged to restore the windows.

how to fit a double glazed window?

Did you just purchase a double glazed window and confused about how to have it installed? Fitting the window yourself can be quite easy with the help of this step by step guide. However, if you lack proper training or experience, we’d recommend you reach out to a trustworthy professional who can guarantee the best results for help. That said, now let’s take a look at the process.

• Remove the old windows by detaching the old beading and glass window safely. Then make some interval cuts using a hand saw before using a crowbar to pry it out.

• Cut the external double glazed window seal. Once done, take a measurement of the window area’s width once empty. Then transfer the measurement to the window sil to face outside and cut using a handsaw.

• Seal the window sil. Add a bead of clear silicone along both inside lip as well as the centre to seal the sil.

• Screw the double glazed window to the sil. Position the window on the top of the lipped section that was siliconed. Then pre-drill them together and screw in three places. You should make sure the screws do not go totally to the sil’s bottom.

• Install the double glazed window. After successfully screwing the double glazed window to the sil, you can now fit in the double glazing. Make use of packers to make sure it’s even in the slot.

• Screw the uPVC window to the wall. If you’re happy and satisfied with the position of the window, you can then pre-drill through the frame of the window and the brick wall. Once done, simply screw it in place using masonry screws or Spax screw as they do not require crawl plugs in bricks.

• Seal around the window. To do this, simply fill any gaps with expanding foam, wipe out the excess and seal with silicone.

how much are new windows?

Are you about to replace your old windows and wondering just how much it’ll cost to have a new one fitted? If yes, then you’ve come to the right place! The question is a very straight forward one, however a direct answer can not be provided as determining window prices for a replacement project can be a very tricky challenge. With a plethora of influencing factors that can play a key role in the price of both materials and labour to be used, it could be extremely hard for a window installer to provide a cost estimate without paying you a visit beforehand.

The factors that can go a long way in determining the price of your new window includes the size of the window, frame material, style chosen, your location, rates charged by the window installer (these rates can be different from an installer to an installer, so it’ll probably be in your best interest to compare quotes to identify the most competitive price) as well as the type of glass required.

Generally, for a small flat featuring four windows, the average cost for new windows would be between the range of £2,100 to £2,300. This range provided covers the cost of double glazed uPVC casement windows as well as the installation price. In the same tone, a home with up to 8 windows will have an average cost for window replacement between the range of £4,400 to £4,600, wile also taking into account the installation price. Whereas a house comprising 10 windows could begin at an average cost of window replacement between the the range of £5,200 to £5,500, and a 15 window home will be between the range of £8,400 to £8,600. it should be noted that the aforementioned figures only include the standard number of windows with a uPVC frame and the installation cost.

how much are new windows?

Are you about to replace your old windows and wondering just how much it’ll cost to have a new one fitted? If yes, then you’ve come to the right place! The question is a very straight forward one, however a direct answer can not be provided as determining window prices for a replacement project can be a very tricky challenge. With a plethora of influencing factors that can play a key role in the price of both materials and labour to be used, it could be extremely hard for a window installer to provide a cost estimate without paying you a visit beforehand.

The factors that can go a long way in determining the price of your new window includes the size of the window, frame material, style chosen, your location, rates charged by the window installer (these rates can be different from an installer to an installer, so it’ll probably be in your best interest to compare quotes to identify the most competitive price) as well as the type of glass required.

Generally, for a small flat featuring four windows, the average cost for new windows would be between the range of £2,100 to £2,300. This range provided covers the cost of double glazed uPVC casement windows as well as the installation price. In the same tone, a home with up to 8 windows will have an average cost for window replacement between the range of £4,400 to £4,600, wile also taking into account the installation price. Whereas a house comprising 10 windows could begin at an average cost of window replacement between the the range of £5,200 to £5,500, and a 15 window home will be between the range of £8,400 to £8,600. it should be noted that the aforementioned figures only include the standard number of windows with a uPVC frame and the installation cost.

Should I get all my windows replaced at once?

You don’t have to, especially if you’re on a budget. If you’re only replacing some, it’s a good idea to get all the windows on one side of your property replaced at the same time, so they all look the same. Be aware, obviously, huge savings could be had by having a number of windows replaced at the same time.

How much is it to repair the glass in a window?
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.

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