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Windows Double Glazing Surrey

Triple Glazing Andover & Hampshire

With over 40 years of industry experience, KJM provides high quality home improvements throughout the Andover, Reading, Basingstoke,Berkshire, Bracknell, Camberley, Dorset, Guildford, Hampshire, London, Newbury, Salisbury, Southampton, Surrey, Winchester, Woking and the surrounding areas. To receive a bespoke quote for our triple glazing, contact us using our contact form today. Alternatively, for more information read our triple glazing blog post.

Key Product Features

KJM triple glazing in Hampshire offer’s both 40mm and 44mm triple glazing for the very best in heat insulation in your triple glazed windows. Using Pilkington S1 soft coat (x2) and float glass, argon filled with a 16mm Swisspacer Ultimate warm edge spacer the glass achieves a centre-pane U-value of 0.5.

A similar sealed unit with 14mm spacer bars will give a centre pane  u-value of 0.6. The Sheerline Prestige, Residence 9 and Residence 7 flush casement window systems can house a 44mm triple-glazed sealed unit.

Improved security protection
Enhanced sound insulation
Comfort and stability
Excellent energy efficiency
Utilises modern technology
Longevity and durability
Windows Double Glazing Hampshire

Andover & Hampshire

Are triple glazed windows worth it?

If you are thinking about replacing your windows or doors, then you should consider KJM’s range of triple glazing. Whilst it’s true that some triple glazing is not better than some double glazing, it is all about the specification of the glass and the gaps between the panes. Generally speaking the most thermally efficient sealed units will have a gap between 14-16mm. 

When looking for argon filled triple glazing, the gaps between the glass should ideally be no more than 14mm-16mm, if it is smaller than that, the thermal efficiency may be lower than double glazing. We can offer five triple glazed systems: Sheerline aluminium, Deceuninck, Profile 22 and both the Residence 7 & 9, choose from their 40mm or 44mm thick units to provide the best insulation in the market. Alternatively, visit our gallery to view installed units for your comparison.

Cut through section white uPVC triple glazed window

What is the u-value of triple glazed windows?

Building regulations are becoming more stringent regarding thermal efficiency. The method of comparing the energy performance of windows is to use the U-value, as used when comparing walls, roofs and floors. Over time U-values in windows have dropped. When we only used single glazing, windows had a U-value in excess of 5.0 W/m2K, early double glazing reduced this figure to 3.0, but over the years the U-value on double glazed units has dropped to around 1.1, with the introduction of warm edge spacers, argon gas and low-e glass. 

Actually the best double glazed unit manufacted from Pilkington S1 glass with a 16mm argon filled gap gives a centre-pane value of 1.0. 44mm triple glazing offers a centre pane U-value of 0.5. This type of window offers a centre pane u-value of 50% better insulation than our “A” rated double glazing. It is in most cases over 25% better insulated than our rivals 36mm triple glazing. We can also offer 28mm triple glazed units (2 x 8mm gaps) filled with krypton gas and 3 layers of 4mm glass (as our 44mm system), which achieves a centre pane u-value of 0.60.

We offer this smaller unit because some of our range cannot accept the wider 44mm units and some of our customers prefer the bead detail on the 28mm system. Krypton gas works better on smaller air-gaps than argon, but is MUCH more expensive than argon filled units. Either way KJM can provide a triple glazed unit to suit your requirements.

White uPVC 40mm triple glazing

Andover & Hampshire

Triple glazing manufactured with the Swisspacer Ultimate

Widely regarded as “The Ultimate Warm-Edge Spacer”, the Swisspacer Ultimate sets a new benchmark for spacers in energy efficiency, comfort and dimensional stability. This spacer bar improves on the previous Swisspacer V by 20%. Being a strong and rigid structure, they are ideal for triple glazed units to stop moisture getting in and insulating gas getting out.

When its really cold outside, and the internal air temperature is at 21°C, a triple-glazed window, with a centre-pane U-value of just 0.5, will create internal surface temperatures of 18°C. Other advantages our triple glazing offers include improved security due to the extra pane of toughened glass and incredible sound insulation for your home.

Green Residence 9 windows available in 44mm triple glazing

Andover & Hampshire

Save Energy with Triple Glazed Windows

Triple glazing is widely used in cold climate countries like Sweden and Norway and has been for some time. The physics of triple glazing  have been worked out in Germany by the PassivHaus Institute. It has shown what happens to the internal surface temp­eratures on various forms of glazing when its really cold outside, and the internal air temperature is at 21°C:

  • A single-glazed window, the internal surface temperature is around 1°C.
  • A typical double-glazed window fitted 10 years ago the surface temperature is around 11°C.
  • A modern, energy-efficient double-glazed window, the surface temperature is 16°C.
  • A triple-glazed window, with a centre-pane U-value of just 0.65, the temperature is 18°C.


Improved Security

Improved security over double glazed windows, due to the extra pane of toughened glass. Internally glazed windows offer added security and prevents the removal of the glass from the outside.

Sound Insulation

There is no major gain having triple glazing with three equal thicknesses of glass. The best solution would be with a thicker centre pane, please enquire for further information.

Heat Insulation

44mm sealed units filled with two 16mm cavities of argon gas. Argon gas is heavier than air, so acts as an insulator

Prevent Cold-Bridging

Warm edge spacer bars made from a composite material to stop the cold-bridge across the unit.

Low-emissivity Glass

Two coatings of low-emissivity glass (Low E). This is a microscopically thin coating that stops the heat from your house going outside.

Plenty of Options

Available in the Sheerline Prestige, Residence 9 and Residence 7 systems as a 44mm unit.

Triple Glazing Prices Andover & Hampshire

Triple glazing can be more expensive than double glazing, but as a comparison, they do not add much more than 25% to the double glazed costs typically found around the Andover, Camberley, Hampshire and surrounding areas. This would work out at about £150 on an average size window.

While we can offer a rough price for our triple glazing, we would happily provide a complete bespoke quotation for our glazing services in Salisbury and installation. Contact us using the online contact form; our friendly sales team will gladly help.

Frequently Asked Questions

Will installing triple glazed windows cause overheating in the summer?

Are triple glazed windows worth it?

How much do triple glazed windows cost?

Are triple glazed windows better than double glazing?

What do triple glazed windows do?

Are smaller triple glazed units available?

KJM Windows Swisspacer Bar Animated Video

KJM Windows & Conservatories use Swisspacer

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Data 44mm Argon Filled Triple-Glazing pdf

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Data 40mm Argon Filled Triple-Glazing pdf

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Data 36mm Argon Filled Triple-Glazing pdf

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Data 28mm Krypton Filled Triple-Glazing pdf

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Sheerline Aluminium Brochure pdf

19.86 MB

Profile 22- 40mm Triple Glazing pdf

19.33 MB

Residence 7 Windows pdf

8.17 MB

Residence 9 Windows pdf

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Triple Glazing Berkshire

Triple Glazing Bracknell

Triple Glazing Guildford

Triple Glazing Hampshire

Triple Glazing London

Triple Glazing Newbury

Triple Glazing Salisbury

Triple Glazing Southampton

Triple Glazing Surrey

Triple Glazing Winchester

Triple Glazing Woking

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