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Alexander Constructors

0 review(s)
Offers services in MERTHYR TYDFIL
South Wales, Penarth based design and build contractor. Projects completed include new houses, extensions, kitchens, bathr...
Over 20 Reviews

Securahome PVCu

26 review(s)
Offers services in MERTHYR TYDFIL
Est. in 1994, Securahome, based in Gorseinon, Swansea, offers a range of UPVC, timber and aluminium orangeries, windows, d...

Thermaglaze Home Improvements

0 review(s)
Offers services in MERTHYR TYDFIL
Complete home improvements with honest pricing, brought to you with both innovation and design.

A One Home Improvements South West

1 review(s)
Offers services in MERTHYR TYDFIL
Over 35 years’ experience, we offer the complete package from design to installation & 10 years beyond. We offer start to ...

Recent Window Installer Enquiries

20 Aug

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Desmond D

Start Date: Immediate

2+ windows Supply and install

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19 Aug

uPVC Double Glazing

Merthyr Tydfil - CF47

Enquiry from: Angela W

Start Date: Immediate

2+ windows Supply and install

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01 Jun

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Jamie K

Start Date: Immediate

Multiple windows to be Supplied and installed

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23 Apr

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Ellen W

Start Date: Immediate

Multiple windows Supply and install

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17 Jan

uPVC Double Glazing

Merthyr Tydfil - CF47

Enquiry from: Geraint L

Start Date: Immediate

What best describes your living situation? How many windows are you considering replacing? - 6. What material do you require, UPVC? - upvc. What colour do you want them to be? - white. Do you require

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09 Jan

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Wayne H

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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07 Jan

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Laura S

Start Date: Immediate

What best describes your living situation? are you the home owner of that property? - -. how many windows are you considering replacing? - -. what material do you require, upvc? - -. what colour do yo

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31 Dec

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Wayne H

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 door

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12 Dec

uPVC Double Glazing

Merthyr Tydfil - CF47

Enquiry from: Jodie S

Start Date: Immediate

Are you the home owner of that property? - yes. How many windows are you considering replacing? - 12. What material do you require, UPVC? - upvc . What colour do you want them to be? - WHITE . Do you

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19 Nov

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Christine 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

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15 Nov

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Jennifer L

Start Date: Immediate

Considering a range of options 2+ windows Supply and install

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12 Nov

uPVC Double Glazing

Merthyr Tydfil - CF48

Enquiry from: Cara T

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, UPVC? upvc What colour do you want them to be? - Do you require doors If so

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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 Merthyr Tydfil is:

£2,082

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

Related Window Installer searches in Merthyr Tydfil

Window Installer FAQs

Can the glass in a double glazed window be replaced?
Yes, the glass in a double glazed window can be replaced. The glass in a window, or sealed unit to use its proper name, is not permanently attached to your window frames so if it gets damaged but your frames are still intact, there’s no need to replace the whole window. The glass in your double glazed window might need to be replaced due to:
  • Impact from a stone or other object smashing the glass in a ‘bullseye’ effect
  • The result of a break-in
  • Extreme weather or changes in pressure causing a crack
  • The sealed unit being ‘blown’, meaning that it’s no longer energy efficient due to air leaking out
A lot of window installers will replace the glass in your double glazing for you, but you might need to get quotes from specialist glaziers too. Glaziers deal purely with the glass in windows rather than installing entire frames. It won’t take a professional very long to replace the glass in your window. They will remove the beading from around the window with a pallet knife or chisel, leaving the top one until last to keep the sealed unit stable. Then, they simply lift out the glass carefully and will discuss with you whether the removal of the old sealed unit is included in their quote. Next, they will brush away any dust and debris that’s made its way into the frame and place spacers at the bottom. They will then lift the new glass into the frame, making sure it’s completely square. When they’re happy, they’ll remove the spacers and replace the beading back in reverse order. You’ll notice the replacement glass in your new window straight away as draughts should be eliminated and you’ll be able to see clearly again!
What is the Window Energy Rating (WER)?

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.

Can you replace just one double glazed window?

Yes, of course! It’s common for people to replace just one double glazed window. One reason that people want to replace one window is that the sealed unit inside has failed. You’ll know if this has happened because you’ll be able to see condensation on the inside of glass, which gets frustrating because you can’t wipe it away. In this case, you can choose to simply replace the sealed unit or the entire frame, which you might want to do if it’s looking past its best.

When you’re replacing just one double glazed window, if you know the brand of your current windows you could ask your installer if they can source the same ones. This will help to keep them looking as similar as possible, although if your existing windows are very old you may notice some discolouration on the exterior compared to the new one, and locks and trickle vents might look different.

Replacing just one double glazed window shouldn’t take a qualified window fitter long, and could cost as little as £400. If you want to simply replace the sealed unit, that may only cost around £250. You could try to fit a new window yourself, but it’s worth bearing in mind that all replacement windows need to be certified that they’ve been installed to meet building regulations, so you’ll need to apply to your local building control officer who will come and inspect the work then issue a certificate. If you ask an installer who is registered with a self-certification scheme (like FENSA) to fit the window for you, they can issue the certificate themselves when they’ve finished the work.

is a porch made from uPVC?

The simple answer to this question is... they can be! Although there are many types of porch designs that are available in the market, the uPVC porch happens to be one of the most loved and cost effective. Most home and property owners prefer the installation of a uPVC porch for a number of reasons. These includes:

• Value for money

It’s no coincidence the uPVC is widely accepted across the building industry with a plethora of uses. Not only is it relatively inexpensive to manufacture, but even the recycled uPVC is now becoming more and more useful. UPVC’s main rivals are wood and aluminium, and both are way more expensive to incorporate for frame profiles. Therefore, making use of uPVC is going to make your initial costs relatively low.

• Life Span

Although the main rivals in both hardwood and aluminium can also boast a lengthy lifespan just as uPVC. However, considering the price that you can get a uPVC, the lifespan is just incredible as it can be measured in decades.

• Aesthetic Appeal

UPVC gives you a wide range of foil colours that’ll fit your home perfectly well while also enhancing it’s visual appeal. You can actually get a porch that looks exactly like it’s manufactured from timber frames. To achieve this, all you need to do would be to make use of a wood grain surface finish. This is also long lasting, strong and resistant to fade.

• Little Maintenance

This is a very common feature of uPVC that makes it even more advantageous when used in making a porch. Unlike timber or wood which swells due to absorption of water or shrinks, you’ll never need to worry about all these distortions and more with uPVC. No painting, no sanding and ultimately, low maintenance required.

How to remove a aluminium double glazed window?

Removing a double glazed window can be quite labour intensive. If you decide to try it yourself, make sure you give yourself plenty of time, and wear gloves and goggles.

Begin by unscrewing all opening windows at the hinges and removing them. Then take away the beading and putty around any fixed panes and take them out too.

Once you’ve removed all the glass, use a saw to put angled cuts in the frame, and a bar and hammer to remove it in sections. You should remove the sill if you’re going to replace that too.

Finally, cut through any screws holding the frame into place with a hacksaw.

What are the other double glazing options?

Double glazing frames don’t just have to come in uPVC and are available in other materials including aluminium and wood too. Wooden or timber windows are more suited to properties with a traditional look and are often the frame of choice for listed buildings and homes in conservation areas. When properly maintained wooden windows can last well for years but can be up to three times more expensive than uPVC.Aluminium is the strongest and most durable option. As a metal it is highly resistant to the UK’s changing weather conditions and won’t rust, warp, crack or peel. Aluminium offers a modern appeal and is available in a range of colours.

Why aluminium windows?

Aluminium windows have a range of benefits that make them a great alternative to uPVC windows. Developments in technology have meant that modern aluminium windows now have the same energy efficiency levels as uPVC. Plus, their strength and flexibility make them a more attractive choice to many homeowners, particularly for more modern buildings.

Aluminium frames are typically much thinner than uPVC frames, allowing more light in and wider views. The metal can also be moulded to suit custom shapes, making it ideal for unusually shaped windows. Aluminium windows are available in lots of different colours, so can be designed to suit a wide range of interiors and exteriors.

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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