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 |
£9000
£6750
£4500
£2250
£0
| Labour cost | £1,400 | |
| Material cost | £500 | |
| Waste removal | £100 |
Requests for quotations in Portland in August 2026
Requests for Secondary glazing quotations in Portland in August 2026. 0% change from July 2026.
Requests for Secondary glazing quotations in Dorset in August 2026. 0% change from July 2026.
The company was established in 1977 selling and installing aluminium windows mainly in the South West. Believing that the best way of controlling quality was to make the product we started manufacturing in the summer of 1978 since which time we have ...
excellent presentation and good price
Portland - DT5
Enquiry from: Sharon H
Start Date: Immediate
Customer living in Portland area made an enquiry for double glazing quotes via one of our websites. Customer confirmed interest via Homeowner needs advice on options 2+ windows Supply and install Ple...
Portland - DT5
Enquiry from: Shaun H
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Customer made an online enquiry for new double glazing. Homeowner confirmed interest via email/SMS//phone Considering a range of options Homeowner lives in Portland area 2+ windows Supply and install ...
Portland - DT5
Enquiry from: Paul M
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Customer living in Portland area made an enquiry for double glazing quotes via one of our websites. Customer confirmed interest via Homeowner needs advice on options 2+ windows Supply and install Ple...
Portland - DT5
Enquiry from: Linda H
Start Date: Immediate
Customer made an online enquiry for new double glazing. Homeowner confirmed interest via Considering a range of options Homeowner lives in Portland area 2+ windows Supply and install Please call to a...
Portland - DT5
Enquiry from: Leanne S
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Customer is looking to get quotes for replacement double glazing. multiple windows Supply and install Please call to quote.
Portland - DT5
Enquiry from: Victoria P
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Customer made an online enquiry for replacement windows via one of our websites. Confirmed via . 2+ windows Supply and install Please call to arrange an appointment to quote.
Portland - DT5
Enquiry from: Gail B
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Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in Portland area and is considering a range of options for their home. 2+ windows Supp...
Portland - DT5
Enquiry from: Lee M
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Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in Portland area and is considering a range of options for their home. 2+ windows Supp...
Portland - DT5
Enquiry from: Catherine B
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Customer made an enquiry for replacement double glazing via one of our websites. Looking at various options Confirmed interest, SMS at 17:40 2+ windows Supply and install Please call to discuss option...
Portland - DT5
Enquiry from: Sandra T
Start Date: Immediate
Customer living in Portland area made an enquiry for double glazing quotes via one of our websites. Customer confirmed interest via Homeowner needs advice on options 2+ windows Supply and install Ple...
Portland - DT5
Enquiry from: Sholto D
Start Date: Immediate
Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in Portland area and is considering a range of options for their home. 2+ windows Supp...
Portland - DT5
Enquiry from: Collette J
Start Date: Immediate
Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in Portland area and is considering a range of options for their home. 2+ windows Supp...
Portland - DT5
Enquiry from: Sue M
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Customer is looking to have windows installed. They are unsure what options to go for so would like to discuss directly multiple windows to be Supplied and installed Please call to quote.
Portland - DT5
Enquiry from: Gemma J
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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...
Portland - DT5
Enquiry from: Carole D
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...
Portland - DT5
Enquiry from: Eleanor M
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...
Portland - DT5
Enquiry from: Catherine 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? - Do you require doors If so how ...
Portland - DT5
Enquiry from: Niki C
Start Date: Immediate
Are you the home owner of that property? Yes How many windows are you considering replacing? 5/8 What material do you require, UPVC? UPVC What colour do you want them to be? White Do you require doors...
Portland - DT5
Enquiry from: James C
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? - Do you require doors If so how ...
Portland - DT5
Enquiry from: Kirsty T
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, UPVC? upvc What colour do you want them to be? White Do you require doors I...
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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.
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.
uPVC is unplasticised polyvinyl chloride. It is a favourite amongst homeowners and manufacturers for its cheap production cost and excellent benefits. uPVC is used for window frames, conservatories and doors. In fact, uPVC can be three times cheaper than wooden frames and is also the most energy efficient option.As well as this, uPVC is now available in a range of colours other than the typically seen bright white finish. It can also be recycled, is durable and resistant to changing weather conditions.
Just like every other thing in your house, your double glazed windows have an expected lifespan attached to it as it gradually becomes less functional and less efficient over time. Although there are actually top quality windows which are able to last a very long time, but the fact still remains that nothing can stand the test of time or last forever. Even the best quality double glazed windows will eventually need to be replaced at some point. So exactly how long do double glazing windows last before need a replacement?
To make it brief, most double glazing window units are typically expected to last an average of 20 years. This number of years can, however, vary within the range of 10 to 35 years based on the several factors such as the type, quality of materials as well as installation and where the windows are located.
The reason for the depreciation in double glazing windows is, over time, the windows may be subjected to some wear, tear as well as all kinds of minor damages which includes gas filled insulated glazing unit slowly and gradually leaking. According to the Centre for Sustainable Energy, the evaporation of 25 percent of gas will ultimately minimize the windows’ thermal performance. And when this occurs, fitting a secondary glazing measure or replacing the windows should be put into consideration.
Another factor leading to the gradual depreciation in double glazing windows over time has to do with condensation. When the window collects between the layers of glass due to the failure of the seal of the perimeter and the saturation of the desiccant, can only be solved by IGU replacement.
And finally, the ravages of time also has a way of taking its toll on double glazing windows. This can happen in so many ways such that the window becomes a lot less efficient and later needing to be replaced.
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