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Verified ProOver 20 Reviews

GCB Windows

26 review(s)
Offers services in BELFAST
Bell Windows was brought together in 2008 by Gordon Bell. Even though it is a relatively young company, Gordon himself has...

Athena Windows

0 review(s)
Offers services in BELFAST
Athena have created a completely fresh and new approach to helping homeowners to make the most inspired, informed and resp...
Expert installers of home improvements, including double & triple glazed windows, doors & conservatories. We have 30 years...

Recent Window Installer Enquiries

12 Oct

uPVC Double Glazing

Belfast - BT6

Enquiry from: Gerard G

Start Date: Immediate

Call back anytime

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11 Oct

uPVC Single Window

Belfast - BT6

Enquiry from: Charlotte C

Start Date: Immediate

New window, 177 height by 158

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06 Oct

uPVC Single Window

Belfast - BT9

Enquiry from: H

Start Date: Immediate

Window with 2 openings 1.5 x1.5 m

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03 Oct

uPVC Double Glazing

Belfast - BT5

Enquiry from: Graham E

Start Date: Immediate

1 need 11windows and 2 doors

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02 Oct

uPVC Double Glazing

Belfast - BT5

Enquiry from: Neuddin L

Start Date: Immediate

I am looking for the quote to replace single glazed window and to fix double glazed windows for semi detached house

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01 Oct

uPVC Double Glazing

Belfast - BT9

Enquiry from: Annalene M

Start Date: Less than one month

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27 Sep

uPVC Double Glazing

Belfast - BT15

Enquiry from: Leanne M

Start Date: Immediate

3 large windows 4 small and a white plain pvc door front and a glass pvc back door

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19 Sep

uPVC Double Glazing

Belfast - BT13

Enquiry from: Richard M

Start Date: Immediate

Need double window lounge and single bedroom window

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18 Sep

Porches

Belfast - BT17

Enquiry from: Ben F

Start Date: Immediate

They are considering a couple of projects at the moment

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18 Sep

uPVC Double Glazing

Belfast - BT17

Enquiry from: Ben F

Start Date: Immediate

I am looking to get quotes to have 2 windows windows replaced

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16 Sep

uPVC Single Window

Belfast - BT8

Enquiry from: PAUL N

Start Date: Immediate

Replacement bathroom window

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01 Sep

Aluminium Windows

Belfast - BT15

Enquiry from: Jacqueline G

Start Date: Immediate

Bay window replacement with aluminium

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29 Jul

Replacement Glass Only

Belfast - BT15

Enquiry from: Tracy G

Start Date: Immediate

I need a replacement window for back door

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29 Jul

uPVC Double Glazing

Belfast - BT13

Enquiry from: TERRI J

Start Date: Immediate

3 Windows are building up with condensation in between the glass and whoever installed them should have never been passed

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25 Jun

uPVC Single Window

Belfast - BT8

Enquiry from: Ernest F

Start Date: Immediate

Replace window to garage approx 1mx1m pvc brown single glazed

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18 Jun

uPVC Single Window

Belfast - BT8

Enquiry from: Ernest F

Start Date: Immediate

One window single glazed for garage approx 1mby 1m

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01 Jun

uPVC Double Glazing

Belfast - BT14

Enquiry from: Geraldine M

Start Date: Immediate

Considering a range of options 2+ windows Supply and install

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30 May

uPVC Double Glazing

Belfast - BT12

Enquiry from: Mary M

Start Date: Immediate

Multiple windows to be Supplied and installed

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19 May

Replacement Glass Only

Belfast - BT7

Enquiry from: Patrick M

Start Date: Immediate

In the kitchen the pvc window window

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03 May

Replacement Glass Only

Belfast - BT15

Enquiry from: Michael B

Start Date: Immediate

850 x 760 double glazed unit replacement. Window is second floor above bay window pvc holding trim is on outside of window

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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 Belfast is:

£2,082

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

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Window Installer FAQs

How long do double glazed sealed units last?
When it comes to how long double glazed sealed units (the glass inside the window) last, a lot of it is down to the quality of the glass and the environment that your windows sit in. It’s not uncommon for your window frames themselves (especially if they are uPVC) to last longer than your sealed units. Sealed units are called that because they’re two panes of glass sealed together with an air gap in between. They use what’s called a ‘perimeter seal’ to protect the air gap between the panes, and is usually made of butyl mastic which retains a desiccant within a perforated metallic spacer bar. The desiccant’s job is to absorb any moisture which finds its way into the air gap to stop your window from misting up on the inside. When a sealed unit fails, or is ‘blown’, it’s usually because moisture builds up around the seal and causes it to fail. Sealed units won’t last forever, so you will eventually end up with condensation inside the panes of your double glazing, but in an ideal environment your double glazed sealed units could last up to 30 years, with some manufacturers claiming as long as 40 years. But they do require a bit of maintenance and the position of your windows will also make a difference as to how long they last. There are a few things that determine how long a sealed unit will last:
  • Climate - If your window faces south, it will be subject to direct sunlight for a lot of the day. This tends to cause the sealed unit to fail more quickly – a south-facing window may last between 10-25 years. This is because the spacer bars will twist as the temperature rises and causes the adhesive holding them together to eventually fail.
  • Moisture - Windows in kitchens and bathrooms tend to fail more quickly because they come into contact with moisture more often. For example, if water gets on your windowsill when you shower, the seal around the glass will come loose more quickly if it’s constantly wet.
When you replace the sealed units in your windows or get completely new double glazing, make sure you choose an installer that uses quality products and will take all the steps to ensure that your sealed units are kept away from moisture as much as possible.
how to fit a double glazed window?

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.

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.

Are A-rated windows worthwhile?

On the grand scale of things there isn’t a huge difference between B-rated windows and A-rated windows. Consumer watchdog Which? have calculated an extra 6.5% would be saved on energy bills with A rather than B rated panes. Be aware that A rated windows are slightly more expensive, however.

What is uPVC?

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.

how to tile a porch roof?

Tiling a porch roof is a very important but laborious and difficult task. A project of this magnitude will require a large investment in planning and preparation way before the actual installation process takes place. It can be a brand new porch roofing tile or a replacement of the existing one, either way it’s crucial to get the right technique. If you lack proper training or experience in this field, we’d recommend you hire the services of a reliable professional probably within your local area to guarantee the best results and to save yourself some time and money. This guide will give you a good insight into the porch roof tiling process. Let’s have a look!

• With the crown looking upwards, put the first tile on the batten and centre the tile from side to side.

• Hammer a 10d nail at the base of the tile and into the batten (make sure not to overdrive the nail).

• To provide a much needed support, apply a little mortar under the first tile.

• Identify the inner end of the first tile and place another tile on top. Take a measurement from the outer end and adjust the end of the second tile to fit.

• Just like you’ve done with the first tile, nail the second tile into the batten.

• Position two tiles at the both ends of the ridge and proceed with the installation just as you’ve done with the previous tiles.

• Take a measurement of the distance across the ridge from the first tile’s outer end. Once done, you can then calculate the number of tiles required by subtracting 16 inches from your measurement and divide the answer by 8.

• Beginning at the second tile on one end of the ridge, install the half the number of ridge tiles towards the centre of the ridge. Now install the remaining tiles working from the opposite end to the ridge’s centre. At the centre of ridge should be a key tile with mortar.

how long does double glazing last?

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.

How to replace the glass in a uPVC window?
It’s not too difficult to replace the glass in a uPVC window, so if you’re a confident DIYer you could have a go at this yourself. We’ll go through the main steps on how to replace the sealed unit in a uPVC double glazed window:
  1. Using a rubber mallet and a strong pallet knife, remove the beading around the window. You might think they’re part of the frame, but they’re actually separate on the inside of the frame and can be taken out by using pallet knife to prize them out. Start with one of the longest beads first and leave the top bead until last.
  2. Give the glass a little tap to loosen it if it doesn’t come out straight away, then the whole unit should slide out easily. Just make sure it falls towards you and not back out onto the ground below!
  3. Clear any debris that has found its way into the frame with a brush. Add spacers at the bottom of the frame – these could be pieces of plastic.
  4. Get your new sealed unit (make sure you measure the glass before you buy one so you know which size to get) and carefully take it out of the packaging. Look for the British Standard mark – that shows you the bottom of the glass.
  5. Lift the glass into the frame, starting with the bottom first, and make sure that it fits square in the frame before taking the spacers out.
  6. Use a little washing up liquid to spread along the beads to make it easier when you slide them back into the frame. If they simply push and clip back in, you can use something like a block of wood to help you push them in correctly. Put them back in reverse order to how you took them out.
And there you go! If you’re feeling confident you can have a go at replacing the glass in your uPVC window yourself. But if you’ve got any worries, leave it to a window installer who will be able to do it in less than an hour.

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