Double Glazing Cost 2018
How much does it cost to buy double glazing in 2018?
For those homeowners in the market looking for new windows & doors, getting the best value for money is obviously important. So how do double glazing prices in 2018 compare to the previous year and what can you get for your money?
A short guide to the average cost of Double Glazing Windows
The good news is, that the home improvement market is still just as competitive as it has always been, if not slightly more so. This has had the effect of keeping the cost of double glazed windows & doors very stable.
It may go without saying, but prices can vary a lot by supplier, style, energy efficiency, colour, material or even regionally.
The best way to get an accurate cost is to have a home survey and a set of written quotes based on actual products that you want to fit.
Quick content guide:
- Average prices for the main window styles.
- How much will it cost to double glaze your home.
- Prices for optional extras.
- Cost guides for Casement, Sash and Tilt / Turn windows.
- Getting your windows fitted, or, choosing an installer.
How much will it cost to buy double glazed windows for your home?
As a general guide to cost, based on a survey of prices published on the internet, you could expect to find fully fitted examples as follows:
(There is a more detailed breakdown later in the article).
- Average sized Casement window: Prices range from £250 to £500
- Average sized Tilt & Turn window: Prices range from £400 to £605
- Average sized Sash window: Prices range from £250 to £500
Casement windows regularly show up as the cheapest double glazed window style, especially UPVC casement windows.
For example, 1200mm x1200mm White UPVC Casement window prices, for supply only, can be found at between £150 to £160. The WER rating for this price is likely to be in the C-band.
The other popular styles of Sash windows or Tilt & Turn are more complex designs, need more time and effort to manufacture and are therefore costlier to buy and install.
What is the cheapest material to use in the window frames?
Based on a casement window size no larger than 600mm x 1,000mm
- White UPVC price range from £250 to £500
- Hardwood price range from £700 to £900
- Aluminium price range from £450 to £600
The wide price banding is purely down to the amount of variations in the specification of the windows that people purchase.
How much does it cost to double glaze a house?
A lot of homeowners also choose to replace the external doors at the same time as the windows. If you are planning to do the same thing, then you should allow approximately:
- £800 to £1,100 for a composite door
- £500 to £800 for a UPVC front door.
- £800 to £1,000 for an Oak door.
- £1,000 to £1,200 for aluminium doors.
Double Glazing Price guide: The cost of having your existing windows replaced and new ones fitted
|Number of windows||uPVC||Aluminium||Hardwood|
|Apartment or flat up to 4||£1,500 to £2,000||£2,300 to £2500||£2,000 to £2,500|
|Terraced up to 8||£3,500 to £4,000||£4,000 to £4,500||£4,000 to £5,000|
|4 or 3 bed Semi, up to 10||£4,000 to £4,500||£5,500 to £6,500||£5,500 to £6,000|
|4 bed Detached, up to 12||£4,500 to £6,000||£6,500 to £8,000||£6,000 to £7,000|
Personalisation: How much do the optional extras cost?
The first option that you could be faced with is to decide the energy efficiency rating for your replacement windows.
Just like your TV, Fridge & other consumer goods, double glazing windows have to be rated for energy efficiency. Typically, the ratings will run from A++ to G. Building regulations in the UK set a standard of “C” as the lowest WER acceptable to meet the regulations.
A++ rated windows are likely to cost more than C rated products. Double glazed windows with a C rating are more than adequate to do the job well.
What items can be classed as optional extras?
It’s a very good practice to confirm exactly what is, and is not, an extra with your installers at outset, preferably whilst they are creating your quotation.
- Energy saving glass (low-e).
- Gas filled sealed units (Argon) / extra wide units (e.g. 28mm).
- Toughened, tempered or laminated glass.
- Patterned, frosted, coloured or leaded glass.
- Opening sections. Panels that can open & close attract an extra cost in many cases.
- Standard “float glass” pane thickness is 4mm. Thicker glass costs more.
- Adding a colour or woodgrain finish to UPVC or Aluminium.
- Alternate cills from standard
If we take an example of a supply only, single panel UPVC casement window measuring 900mm wide x 900mm high, the price difference can be as follows:
- White UPVC, no cill, clear glass, fixed non opening: Priced from £117.00
- Oak UPVC, 150×30 cill, frosted glass, side opening, silver handles: Priced from £170
So as you can see, the optional extras added almost 50% to the cost of double glazing, and suddenly you no longer have your cheap double glazed window!
How much do upvc casement windows cost?
|Window size||Detail||Fitted price|
|600 x 900 x 1 opener||B rated, uPVC||£200 to £250|
|1200 x 1200 x 1 opener||B rated, uPVC||£300 to £350|
|950 x 1500 x 1 opener||B rated, uPVC||£450 to £500|
|Detached 10 to 12 windows||B rated, uPVC||£5,200 to £6,000|
How much do upvc Tilt & Turn Windows Cost?
|Approx size – width x height||Basic Detail||Price guide, supply only|
|1200 x 1200 – single window||white upvc, C rated, double glazed||£260 to £360|
|1200 x 1200 – 2 pane, 2 opening||white upvc, C rated, double glazed||£320 to £450|
|3000 x 1200 – 3 pane, 2 open||white upvc, C rated, double glazed||£570 to £660|
How much do sash windows cost?
|WER (energy rating) & Size||Basic Design||Average Sash window prices|
|600mm x 1000mm – B WER||single hung white uPVC||Starts at £400 – fitted|
|900mm x 1000mm – B WER||single hung coloured uPVC||Starts at £300 – supply only|
|1200mm x 1000mm – B WER||single hung white uPVC||Starts at £550 – fitted|
|1500mm x 1000mm – B WER||single hung white uPVC||Starts at £350 – supply only|
Getting your windows fitted, or, choosing an installer.
There are some very good reasons for taking the time to think about who is eventually going to supply & fit your replacement windows.
The last time I checked, there were more than 10,000+ double glazing companies or installers in the UK, so choosing the right one can seem a tall order. Here are some points to guide you.
- Look for FENSA & CERTASS Accreditation: There are three main reasons to deal with accredited installers. 1) they have been independently assessed as competent. 2) They can certify your installation as compliant for building regulations. 3) you get better consumer protection.
- Take references: Satisfied clients are a great source. They can let you know their experience. A dissatisfied customer who has been properly looked after can also be a good source of knowledge about the company.
- If possible, visit previous jobs by the installer.
- Get everything in writing.
- Avoid installers who ask for large up-front deposits (some don’t even ask for a deposit).
- Look for an installer that can offer insurance backed deposit guarantees.
- Get as many quotes as you can, at least 3 or 4, and then take your time to compare what’s on offer.
If you want to know how much double glazing costs in 2018 for your house, just send us a few details via our quote request form (it just takes a minute) and we will do the rest.