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Triple Glazing & Triple Glazed Windows

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TRIPLE GLAZED WINDOWS

FOR A WARMER, MORE ENERGY-EFFICIENT HOME.

  • Our most energy efficient window
  • A++ energy rating
  • Endorsed by Energy Saving Trust
  • Low-E glass retains heat in your home
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OUR MOST THERMAL EFFICIENT GLAZING.

Everest triple glazing is rated A++, the highest energy rating for windows and is endorsed by Energy Saving Trust. The extra pane of glass reduces the conductivity of the window, helping retain more heat in your home. This makes your home warmer, cosier and can help reduce heating bills too.

Everest triple glazing windows endorsed by the Energy Saving Trust
Everest A++ rated triple glazing windows
An energy efficient white casement window with triple glazing in a kitchen

WHAT MAKES TRIPLE GLAZING ENERGY EFFICIENT?

It's not just the extra pane of glass that makes triple glazing energy-efficient. We add many more features to ensure its our most efficient window.

  • Low-E glass
    A microscopic metal coating reflects heat back into your home, making it warmer and cheaper to heat.
  • Storm sash
    Double rebated window with Q-Lon weather resistant seals for weather protection.
  • Argon gas between panes
    Heavier than air, it acts as an insulator, blocking out cold air for optimum insulation.
  • 5 chamber profile
    The sash profile is made up of 5 chambers, designed to prevent heat escaping.

IS TRIPLE GLAZING MORE SECURE?

The extra pane of glass not only helps with thermal efficiency, it can also make your home more secure. The extra pane of toughened glass makes the window more difficult to break and can even stop an attempt in the first place by acting as a deterrent.

All Everest triple glazed windows are also fitted with GrabLock as standard, and internal glazing bead, which prevents glass being removed from outside. So you can rest assured your home is safe and secure.

A highly secure casement window with triple glazing and GrabLock in a cosy living room

DOUBLE VS TRIPLE GLAZING

Is triple glazing better than double glazing? The comparison table below shows the technical differences between an Everest double and triple glazed window.

DOUBLE
TRIPLE
Energy rating A+ A++
Energy Index 15 22
U Value 1.3 1
G Value 0.48 0.41
L Value 0 0
Cost ££ £££
 

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IS TRIPLE GLAZING WORTH IT?

Triple glazing is more thermally efficient and secure than double glazing, but whether it is the right choice for you and your home will depend on several factors.

  • +
    Is triple more expensive than double glazing?
    Yes, an identical triple glazed window will cost more than a double glazed window. However, this depends on a number of factors such as size and other window options chosen, but in general its between 10% and 20% extra.
  • +
    How energy efficient is the rest of my home?
    If your home is poorly insulated, triple glazing will have a less positive effect as heat will still escape from poorly insulated areas. If you have single glazing, then just upgrading to double glazing would make a huge difference.
  • +
    Is short or long term saving more important?
    If you want a lower initial investment then double glazing is the right choice for you. However, if you want to save more on your energy bills or energy-efficiency is important for you, triple glazing will be a better choice.
  • +
    Do triple glazed windows reduce noise?
    Many will claim it does just because of the third pane. This is incorrect as actually the middle pane can increase sound vibration and amplifying sound transference. If noise pollution is important for you we recommend you consider our Secondary Glazing or Acoustic Glass, which has been designed to be more efficient at blocking out noise, making it a great choice if you live on a main road.
  • +
    Do you live in a cold climate?
    The further North you live, the more suitable triple glazing would be. If you live in the south double glazing could be more than suitable, although you may want to consider triple glazing for North facing windows and double glazed for south facing.
  • +
    Does triple glazing reduce condensation?
    Condensation comes in three forms (on the outer pane, on the inner pane and between the panes) and it’s not always bad news. If it’s on the outside of the house this is good and a demonstration of quality windows. However, if it’s inside the house this is caused by a lack of ventilation and lower quality double glazing – increasing ventilation within the room can improve the issue otherwise new windows may be needed. If the condensation is in between the panes then your unit has failed and is letting in water, which will require a replacement to rectify. A window that has been designed to reduce condensation will have argon gas between the panes, a wide gap between the panes and a high energy rating of at least A+.

FAQs

Choosing new triple glazed windows can be a daunting task, so to help you here are some popular FAQs which you might find useful.

  • +
    Is triple glazing better than double glazing?
    Triple glazing is better at retaining heat inside the home, though it may not always be the best option. If your property is located facing north then triple glazing would make a great impact retaining the warmth inside your home. However, if you have a property facing south you could benefit from a low iron glass in a double glazed unit to harvest free energy from the sun.
  • +
    Does triple glazing cut out noise?
    Yes, if replacing single glazed with triple glazing then it does help to reduce noise pollution. If you are looking to reduce the amount of noise pollution entering your home, we would recommend looking at the type of glass used in your double or triple glazing. Acoustic glass has a special polymer layer between the panes of glass, which is specifically engineered to disrupt and absorb sound waves. As a result, less sound travels through the window.
  • +
    Does triple glazing keep heat out?
    Some homes are prone to the “greenhouse effect,” particularly in those that have south or west facing windows. Triple glazing may be a solution if you find rooms become unbearably hot. Having three panes of glass means that a triple glazed unit will not harvest as much solar heat gain as a double glazed unit making the room slightly cooler.
  • +
    Will triple glazing fit in double glazing frames?
    No. Standard double glazing units are 28mm thick. In comparison, a triple glazed unit, with three panes and two Argon filled gaps are normally 36mm. If you are looking to replace the glass from your double glazed unit with triple glazing it is advisable to speak to a professional.
  • +
    Is it worth getting triple glazing?
    If your property is particularly cold or susceptible to harsh weather conditions, then looking at installing triple glazing on uPVC windows could be the solution for you.
  • +
    Does triple glazing reduce solar gain?
    G-value or solar gain measures the amount of the sun's 'free' energy that the window lets into the property. Triple glazing, with 3 panes of glass, does reduce this solar gain. However, the fact that triple glazing will normally have two panes of Low-E glass means that the U-value is higher, resulting in a more energy efficient window overall.

WINDOW DESIGNS & STYLES

Triple glazing is available on a range of window designs and styles.

An anthracite grey flush casement window

CASEMENT WINDOWS

Our most popular window with excellent performance and versatility.

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Tilt and turn window in a kitchen opened inwards for easy cleaning

TILT AND TURN WINDOWS

Opens inwards for easy cleaning and tilts for secure ventilation.

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White bay window with leaded glass seen from outside

BAY WINDOWS

Create a sense of space with panoramic views and more sunlight.

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JOIN THOUSANDS OF HAPPY CUSTOMERS

Trustpilot
Golden Oak Triple Glazed windows
I'm so impressed with how warm the house is now in the winter with the triple glazing, there is a definite difference from before. Andrew Green

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