The typical cost of double glazing is approximately £400-600 per window, so youâre looking at approximately £2,000 to install 4 double glazed windows in a flat, and up to and exceeding £5,000 for replacing all the windows in a standard-sized home.
| Avg. price low | Avg. price low |
|---|---|
| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£3600
£2700
£1800
£900
£0
| Labour cost | £1,400 | |
| Material cost | £500 | |
| Waste removal | £100 |
Requests for quotations in Thornton Heath in May 2026
Requests for Secondary glazing quotations in Thornton Heath in May 2026. 0% change from April 2026.
Requests for Secondary glazing quotations in Surrey in May 2026. 0% change from April 2026.
We fit high quality double glazing and the next generation triple glazing, using only the best materials. Fully guaranteed for 10 years, Britelite products will save you money by reducing your energy consumption and require little to no maintenance a...
Not a very structured approach to how to make contact, do the consultation, timeline of providing the cost and then foll...
Crystal is a uPVC Windows and Double Glazing manufacturer and installer. We have built a strong reputation in London and the South East for great value and exceptional service in the design, production and installation of quality uPVC Windows, Doors,...
online reviews scared me
Valley Glazing is a friendly family run business, with over 34 years of experience in the trade. We are FENSA registered and supply a 10 year insurance backed guarantee with deposit protection. We supply and install high quality Windows and Doors i...
Thoughtful insight into what was good from my point of view.
BAU UK are a complete home improvements specialists located in the South Coast, with focuses ranging from windows and doors to insulation and solar. Fully accredited, insured and trained in the latest technologies, our team can offer leading services...
Excellent Service
Suppliers and installers of quality upvc windows and doors, aluminium windows and doors, bi folds, rooflights, lanterns and more right across Cheam, Sutton, London and Surrey. Call today for a quote
good but not competative
Creative Windows & Doors | windows and doors surrey - Creative windows and doors supplier
very competative
Waiting on measurements
Homestyle are an independent Oxfordshire company specialising in bespoke installs of windows, doors and conservatories. Every customer and every home improvement is unique and can be tailored to suit the most discerning of customers. We offer a high ...
Very professional
Thornton Heath - CR7
Enquiry from: Verona B
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 ...
Thornton Heath - CR7
Enquiry from: Antonella A
Start Date: Immediate
Call any time. Number of windows: 4 Quote requested on windows, in PVCu, to be supplied and fitted.
Thornton Heath - CR7
Enquiry from: Charles I
Start Date: Immediate
are you the property owner: owner of the property what level of service do you require: supply and installation of full unit how many windows do you need: 4+ windows do you require doors: none proper...
Thornton Heath - CR7
Enquiry from: Sherene M
Start Date: Immediate
Are you the home owner of that property? yes sole How many windows are you considering replacing? 3 What material do you require, UPVC? upvc What colour do you want them to be? BLUE Do you require do...
Thornton Heath - CR7
Enquiry from: Daksha P
Start Date: Immediate
customer made an online enquiry for quotes for double glazing replacement via one of our websites. customer lives in thornton heath area and is considering a range of options for their home. confirme...
Thornton Heath - CR7
Enquiry from: Daksha P
Start Date: Immediate
customer made an online enquiry for quotes for double glazing replacement via one of our websites. customer lives in thornton heath area and is considering a range of options for their home. confirme...
Thornton Heath - CR7
Enquiry from: Alberto L
Start Date: Immediate
Sash window, white, privacy glass 1080mm wide 1200 high
Thornton Heath - CR7
Enquiry from: Fiona E
Start Date: Immediate
Sell 1 Times Are you the home owner of that property? YES How many windows are you considering replacing? 1 What material do you require, UPVC? upvc What colour do you want them to be? unsure Do you ...
Thornton Heath - CR7
Enquiry from: Reiss W
Start Date: Immediate
Sell 1 Times Are you the home owner of that property? Yes How many windows are you considering replacing? 2 windows What material do you require, UPVC? UPVC What colour do you want them to be? White ...
Thornton Heath - CR7
Enquiry from: Achala D
Start Date: Immediate
homeowner windows upvc supplied and fitted please call to appoint
Thornton Heath - CR7
Enquiry from: Kathy C
Start Date: Immediate
miss requested quotes for upvc double glazing from a window installer around thornton heath. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the...
Thornton Heath - CR7
Enquiry from: Martha C
Start Date: Immediate
Customer is looking to get quotes for replacement double glazing. multiple windows Supply and install Please call to quote.
Thornton Heath - CR7
Enquiry from: Bailo D
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...
Thornton Heath - CR7
Enquiry from: Daxitbhai A
Start Date: Immediate
Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in Thornton Heath area and is considering a range of options for their home. 2+ wi...
Thornton Heath - CR7
Enquiry from: ANGELA S
Start Date: Immediate
miss requested quotes for upvc double glazing from a window installer around thornton heath. they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the...
Thornton Heath - CR7
Enquiry from: Cynthia Y
Start Date: Immediate
customer in thornton heath area made an enquiry for double glazing online. 2+ windows supply and install please call to arrange an appointment to discuss options how many windows do you need: 4+ wind...
Thornton Heath - CR7
Enquiry from: Mariame T
Start Date: Immediate
Customer in Thornton Heath area made an enquiry for double glazing online. Confirmed via phone at 14:08 2+ windows Supply and install Please call to arrange an appointment to discuss options
Thornton Heath - CR7
Enquiry from: Lioness K
Start Date: Immediate
are you the property owner: owner of the property property type: terrace agreed to receive upvc quotes: yes what level of service do you require: supply and fit other forms: none please call to appoi...
Thornton Heath - CR7
Enquiry from: Sharmila K
Start Date: Immediate
i need my windows glass and window changed are you the property owner: owner of the property what level of service do you require: supply and installation of full unit property type: semi detached do ...
Thornton Heath - CR7
Enquiry from: Leon M
Start Date: Immediate
customer is looking to get quotes for replacement double glazing. multiple windows supply and install please call to quote. are you the property owner: relative of owner
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Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.
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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.
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.
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.
The energy efficiency of windows is measured using ratings, varying from A, the most efficient, to G, the least efficient. This scheme is run by the British Fenestration Council (BFRC). To comply with Building Regulations you’ll need windows of energy efficiency at least level C.
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