Double Or Triple Glazing? Which Should You Choose?

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double or triple glazing


Double Vs Triple Glazing: Which Should You Choose?

If you are renovating your house, you might be struggling to choose between double or triple glazing windows.

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When moving home or thinking of upgrading your windows from single glazing, you might wonder whether you should choose double or triple glazing.

It’s not just about the fact that double glazing includes two panes of glass, whereas triple glazing has three.

There are so many more benefits/disadvantages of both that you should consider before you choose either.

You should also think about the cost, how energy efficient they are and how they insulate your house.

In order to help you make your decision, this article will show you what each of them is, how they can benefit your home, how efficient they are, and the cost of each of them.

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Triple Glazing

But first, what are triple glazed windows?

To put it simply, triple glazed windows are modern energy-saving windows.

They are insulated in order to keep heat in and noise out.

The cavity between each of the panes is usually filled with either krypton, xenon or argon.

This creates a seal that reduces the draft and keeps the heat within the house.

So, what are some advantages and disadvantages that come with having triple glazed windows installed?

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Firstly, the pros:

• They offer great sound insulation – better than double glazing!
• High durability and lifespan (triple glazing can last around 30 years!)
• More secure against break-ins, due to the added layer of glazing
• Produces a low U-value (More about ‘U-values’)
• They are extremely energy efficient and can help bring down the amount you spend on your energy bill.

Secondly, the cons:

• Installation can be more expensive than double glazing.
• A lot heavier than single or double glazing, due to the added layer.
• It may not be necessary for the UK climate.


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Double Glazing

Secondly, what is double glazing?

A double-glazed window is made up of two panes of glass. These panes provide a barrier between the house and the outside.

The gap between the panes provides a good level of insulation, a feature that is great for those colder months.

Double glazing is found on most modern houses and is generally, very reasonably priced.

People that upgrade from single glazing to double glazing will start to notice the impact on their electricity bills as soon as they are installed. 

Here are some pros and cons of installing double glazing:

Firstly, the pros:

• It can be cheaper than triple glazing (typical price estimates)
• They can reduce heat loss by up to 100%.
• They are the most popular choice for households across the country.
• Very good at keeping noise out of your home, making them ideal for homes situated in loud, busy, or built-up areas

Secondly, the cons:

• They are less energy-efficient than single or triple glazing.
• Double glazing is not as secure as triple glazing. In which the third pane adds an extra layer of strength.
• Unfortunately they aren’t as long-lasting as triple glazing.

Which Deals Better With Condensation?

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This probably won’t come as a surprise, but triple-glazed windows tend to deal with condensation better.

This is due to the fact that it has three panes – therefore will allow for less of a difference between the temperature inside and outside the house.

If you have double-glazed windows and notice a lot of condensation between the panes, it might be a good idea to upgrade to triple glazing.

Condensation can cause problems to the window frames and excessive moisture. Ideally, it is an issue that should be fixed as soon as possible.

If you don’t have any issues with your current double glazing, then it might not be worth changing them all to triple glazed windows.

Are Double Or Triple Glazed Windows More Energy Efficient?

When you are working out which type of window is better in terms of thermal transmittance, it’s important to look for the ‘U-value’ measurement.

This is an industry-standard that is often used to compare a window’s energy performance. If the U-value is low, the window is more energy efficient.

It’s clear that as double glazing has two panes rather than three, it won’t retain as much heat.

Is it really necessary, however, for those living in the UK?

The answer to this is probably no, it isn’t necessary. The difference in your heating bill won’t be a lot, whether you have double or triple glazing.

However, you shouldn’t only consider the amount of energy transfer that you lose (or gain) through your windows!

It is also thinking about the solar gain that comes with both double and triple glazing.

Increasing the temperatures inside the room, if it’s a particularly hot day and you want your house to warm up accordingly, triple glazing will allow for less of this heat to seep through in comparison to double glazing.

This means that you won’t benefit from the same amount of natural warmth with triple glazing as you would with double glazing.

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How Much Does Double Glazing Cost?

This, of course, will depend on the style and size of the windows (as well as how many windows you need instead) that you want in your home.

It will also depend on the type of glass that you want in your double-glazed windows – examples of which are toughened glass, annealed glass and laminated glass.

They can be anywhere from £2,000 – £7,000but you can easily get a quote that will suit your needs.

When you are purchasing a new home, take a look at the windows.

If they are in good condition and are double-glazed, it will save you money in the long term and mean that you don’t have to invest in new ones.

How Much Does Triple Glazing Cost?

This, yet again depends on how many you want to be installed and the quality of them.

As you would expect, they cost more than double-glazed windows due to their durability and the extra pane of glass.

Triple glazed windows also require more materials to make and need a specialised manufacturing process – that many window glaziers might not offer.

It can sometimes be as much as double or triple the cost of double glazing (depending on from whom you purchase the windows).

When you compare them in terms of their energy efficiency, the difference in the money you save with heating is minimal.

Therefore, you need to consider whether triple glazing is truly worth it.

If you currently have double glazing, and it doesn’t provide as many benefits to your bills as you would like, then switching to triple glazing is likely the way forward.

It will also increase the value of your house and, as mentioned above, the security.

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Do You Have To Upgrade To Triple Glazing From Double Glazing?

There are other alternatives to upgrading your windows to triple glazed windows.

You could invest in heavy lined curtains to help reduce the amount of heat you are losing and to help with noise reduction, or in the summer, invest in blinds that will help to improve the amount of heat that’s transferred into your home.

These are two simple alternatives to upgrading your double-glazed windows to triple glazed windows.

Saving you money that you would have spent upgrading, you can (if you want) use the money that you saved on other upgrades in your house.

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Finally, Is Triple Glazing Really Worth It?

As mentioned throughout this article, triple glazing is significantly more than double glazing – so is it really worth the hefty investment?

You can easily get all the benefits from triple glazing with double glazing if you update them.

There are double glazing windows options on the market that are modern, have A+ energy efficient ratings and offer excellent U-values.

Yes, they might not hold just as much heat as triple glazing does, but does that extra pane of glass really make all the difference?

This, of course, is a decision that has to be made by you.

If you don’t want to spend more for a little less heat loss, it probably isn’t worth it.

You should also consider the fact that triple glazed windows will add an extra level of security to your home, making it harder for vandals to break into.

This is sure to give you a bit more peace of mind when you are leaving your property to either go to work, out to the shops or away on holiday.

It will also depend on what windows you want to upgrade throughout your home. If it’s all of them, the cost will be more substantial.

But, if you only want to upgrade the windows downstairs in your property, it might be worth it in the long run.


Before making the decision whether you will choose double vs triple glazing.

It’s important that you do thorough research, get quotes for each and think about what you want to get out of them.

By deciding which type is more appropriate for your needs, you can discover the types of glass that is available.

As well as the styles and what impact they will have on your home.

It’s a big investment – no matter which one you choose, so it’s important to think carefully first before taking the plunge.

Windows are a big part of your home and could be the difference between a large electricity bill and a small one – as well as making it more appealing to potential buyers when you go to sell your house in the future.

You want to know that you have made the right decision.

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June 12, 2019

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