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Verified ProOver 50 Reviews

WFS ANGLIA

61 review(s)
Offers services in KNEBWORTH
Here at WFS Anglia Ltd, we have built ourselves a fantastic reputation throughout Cambridge, Northamptonshire, Peterboroug...
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Jassi Builders

2 review(s)
Offers services in KNEBWORTH
Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I hav...
Verified Pro
All accesss solutions with over 20 years experience fast and friendly service we aim to please !!!
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StormSeal uPVC Windows

0 review(s)
Offers services in KNEBWORTH
StormSeal offers a personal and carefully managed service for every customer, helping homeowners improve their property wi...
Verified Pro

T&Q; / MASTER HANDYMAN

0 review(s)
Offers services in KNEBWORTH
T&Q / Master Handyman Ltd is a reliable and experienced construction and handyman company providing high-quality services ...

Recent Window Installer Enquiries

09 Oct

Windows | uPVC

Knebworth - SG3

Enquiry from: Lois L

Start Date: Immediate

Call any time. Number of windows: 8 Number of doors: 1 Quote requested on windows and doors, in PVCu, to be supplied and fitted.

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11 Jun

Windows | uPVC | Single Window

Knebworth - SG3

Enquiry from: Claire B

Start Date: Immediate

Are you the home owner of that property? / How many windows are you considering replacing? / What material do you require, UPVC? / What colour do you want them to be? / I assume you require them to be...

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17 Aug

Windows | uPVC

Knebworth - SG3

Enquiry from: Sarah B

Start Date: 1 to 3 months

3+ windows UPVC Supplied and fitted Please contact to appoint House number - 21 Property owner at this address 10 windows to be replaced Please call her to book an appointment *

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13 Aug

Windows | uPVC

Knebworth - SG3

Enquiry from: Sarah B

Start Date: 1 to 3 months

3+ windows UPVC Supplied and fitted Please contact to appoint House number - 21 Property owner at this address 10 windows to be replaced Please call her to book an appointment *

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30 Jun

Windows | uPVC

Knebworth - SG3

Enquiry from: Stephen W

Start Date: Immediate

homeowner 15 windows 1 door UPVC Supplied and fitted 1-3 months please contact to appoint *

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22 Jun

Windows | uPVC

Knebworth - SG3

Enquiry from: Stephen W

Start Date: Immediate

Home Owner 6 windows UPVC Supplied and Fitted Please Contact to Appoint *

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12 Mar

Windows | uPVC

Knebworth - SG3

Enquiry from: H

Start Date: Immediate

Home Owner New Front and back door, back kitchen window, patio doors, small downstairs toilet window, upstairs wide and shallow bathroom window, ensuite bathroom window, 2 large and one smaller bedr...

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25 Mar

Windows | Glazing

Hatfield - AL9

Enquiry from: Jennefer L

Start Date: Immediate

I’m looking to replace 11 misted double‑glazed sealed units in my three‑bedroom townhouse in Park Meadow, Hatfield. The largest window measures approximately 43” × 40”, with the others sli...

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21 Mar

Windows | uPVC

Waltham Cross - EN7

Enquiry from: Carol H

Start Date: Immediate

3 bedroom, living room kitchen, bathroom and patio doors

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18 Feb

Windows | uPVC | Repair

Waltham Abbey - EN9

Enquiry from: Sonia D

Start Date: Immediate

There is a draft on two windows which need to be looked at

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21 Jan

Windows | uPVC | Repair

St. Albans - AL1

Enquiry from: Barrie L

Start Date: Immediate

Service and repair please

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22 Oct

Windows | uPVC

Borehamwood - WD6

Enquiry from: Christina T

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 Borehamwood area 2+ windows Supply and ...

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21 Oct

Windows | uPVC

Enfield - EN2

Enquiry from: Rob F

Start Date: Immediate

Call any time. Number of windows: 10 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.

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27 Sep

Windows | uPVC

Waltham Abbey - EN9

Enquiry from: Christodoulos M

Start Date: Immediate

customer requested quotes for upvc double glazing from a window installer around . they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the informati...

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13 Aug

Windows | uPVC | Single Window

Barnet - EN4

Enquiry from: Jack M

Start Date: Immediate

Single window needs replacement

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30 Jul

Windows | uPVC

Barnet - EN4

Enquiry from: Paul F

Start Date: Immediate

Call any time. Number of windows: 5 Quote requested on windows, in PVCu, to be supplied and fitted.

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17 Jul

Windows | uPVC

St. Albans - AL2

Enquiry from: Lucette B

Start Date: Immediate

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

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30 May

Windows | uPVC | Single Window

Waltham Abbey - EN9

Enquiry from: Sonia D

Start Date: Immediate

Call any time. Number of windows: 1 Style of window: Standard window Quote requested on windows, in PVCu, to be supplied and fitted.

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24 May

Windows | uPVC | Supply

Barnet - EN5

Enquiry from: Shanthi S

Start Date: Immediate

I want to get quotation for following items,see email please 1. Patio door 1 -white pvc Hight 2100 =With 1200 - 2. Window with went 2 hight 1440 -with 980 /1000

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22 Apr

Windows | uPVC

Hemel Hempstead - HP1

Enquiry from: Karen E

Start Date: Immediate

Customer in Hemel Hempstead 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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How much do Window Installer services cost?

How much do Window Installers cost? Prices for Window Installers in 2026 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 Knebworth is:

£2,082

Window Installer job Window Installer cost in 2026
Double glazing in Knebworth £1,500-£5,000
Upvc double glazing units only in Knebworth £800-£1,200
Triple glazing in Knebworth £1,500-£5,000
Aluminium windows in Knebworth £1,875-£2,875
Wooden window in Knebworth £3,750-£5,750
Aluminium windows supply only in Knebworth £2,600-£3,900
Upvc or wood porch in Knebworth £2,625-£4,025
Sash window in Knebworth £1,800-£6,000
Glaziers in Knebworth £57-£87
Secondary glazing in Knebworth £1,500-£5,000
uPVC Single Window in Knebworth £225-£345
Wooden sash windows in Knebworth £3,750-£5,750
Wooden windows supply only in Knebworth £2,760-£4,140
Aluminium repair in Knebworth £240-£360
Window repair in Knebworth £268-£402
Wooden window repair in Knebworth £320-£480

Related Window Installer searches in Knebworth

Window Installer FAQs

What happens to my old windows?

After fitting your new windows, your installer should take away and dispose of your old windows. If you want to keep them, just let your installer know before they start work. The UPVC frames are melted down and used on the unseen parts of new windows. Aluminium frames are re-smelted and wooden are broken down and used as chipboard.

Do I need toughened glass in my windows?

Whether you need toughened glass in your windows depends on where the windows are in your home or business. Toughened glass is sometimes referred to as tempered or safety glass, and it just means it’s stronger than the standard glass that’s usually offered with double glazed windows. So how do you know if you need it?

Toughened glass is useful in areas of your home where you might come into contact with the windows if you were to trip and fall. If you put your hands out to steady yourself on standard glass the chances are it would break into large sharp pieces with jagged edges. Of course, this means that you could seriously cut yourself if this were to happen. With toughened glass, the structure of the glass is changed so that if it breaks it shatters into lots of tiny pieces, minimising the risk to you if you were to fall on it.

You might want to use toughened glass in patio doors, low windows or frames next to doors. It just means that you will be safer if the unlikely happens and you or a family member falls through the glass. There are certain requirements through Building Regulations with windows at a certain level, but any reputable window installer should be able to go through these with you if you need to replace your windows with toughened glass. The regulations will only apply to new windows – there's no need to switch your windows to toughened glass early, but when you do come to replace them you’ll need to make sure they meet the standard.

How much does one double glazed window cost?
How much one double glazed window costs is based on a few factors. If you just want to buy the window to install yourself, it will cost less than if you want an installer to fit it for you. If you want to simply buy one double glazed window without installation it could cost anywhere between £100-£300. That’s for a simple casement window, but other types like sash or tilt and turn windows could cost more. It’s recommended that you get a reputable installer to fit your double glazed windows because they’ve had the relevant training and will be able to install it much more quickly. How much it will cost for them to install one double glazed window will very based on your location, the type of window, how difficult the window is to access and whether you choose standard white uPVC or a coloured or woodgrain effect. An average uPVC casement window might cost somewhere between £300-£400, while a dual turn window might cost between £550-£660 to install. Do you really need to replace the entire window? If it’s just the double glazing that needs replacing, for example if it’s misted up inside, this will cost much less. Most window installers or a glazier will be able to just replace the sealed unit inside, and that may cost as little as £250. It’s always best to get a range of quotes from reputable companies so you know you’ve got a great price and you’re sure you’ll get excellent service.

How long do aluminium windows last?

How long your aluminium windows will last depends on their quality. They should last 20 -30 years at least, but have been known to stay in good condition for up to 45 years. This is considerably longer than uPVC and wooden double glazing.

Should I use a Fensa registered installer?

Using a Fensa registered installer isn’t compulsory but it helps to protect you from cowboys and rogue traders. It will also make life a whole lot easier in regards to Building Regulations. Replacement windows must meet a certain energy efficiency rating and once fitted you need a certificate to show your installation complies. By using a Fensa registered company they’ll issue this certificate, otherwise you’ll need the council to look at the new windows.

Will double glazing stop condensation?

If you’ve got a problem with condensation and don’t have double glazing, you should find that getting new windows will help. Condensation is caused by warm air meeting a cold surface which then turns into water droplets. With two panes of glass, less heat will escape from your home and keep the window warmer, meaning when steam from the bathroom or kitchen touches your windows there should be less condensation.

Why are double glazed windows better than single glazed?

Double glazed windows are better than single glazed generally because they are more energy efficient. The clue’s in the name – double glazed windows have two panes of glass while single glazed windows only have one. In double glazed windows, there is a space between the two glass panes. This space is filled with inert gas or a tight vacuum, which helps to provide an extra level of insulation. That means that heat won’t escape your home easily, nor will it creep in, so you can keep your home at a more comfortable temperature.

The extra pane of glass also helps to increase your home’s security. Single glazing is pretty easy to smash through, whereas it will take much more effort to smash double glazing and will create more noise, so burglars might be put off.

Another reason why double glazed windows are better than single glazed ones is that they help to reduce noise. Of course, if you live by a busy road you’ll still hear some traffic noise, but it can be significantly reduced buy double glazing. In the same way that the inert gas in the middle of the two panes keeps heat in and the cold out, it also helps keep noise out.

With double glazing, you’ll also notice much less condensation. With single glazing, it’s common to see condensation on the inside of the windows, especially when the heating is on. This is because the outside of the window is cold, but the inside is warm. With double glazing, the insulation between the two panes stops there being such a difference in temperature between the inside and outside of the window.

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.

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