Our range of Triple glazed windows & doors
KJM supply and install triple and double glazed products in and around Winchester and the surrounding counties. Established in 1982, we are approaching 40 years of award winning experience in the field. Because of this experience, we realise how important it is for our customers to feel relaxed and comfortable from the quotation stage. This is why our sales staff are not commissioned; instead they strive to give frank and honest quotations at the best prices.
We don’t structure our prices based on discount marketing. By contrast, we pledge to always offer our lowest possible prices. As KJM are recognised and endorsed by Hampshire Trading Standards and Which? we know that customers are confident in our reputation. We offer a 10 year warranty on products so that confidence can extend well into the future of your windows, doors and conservatory.
With a wide range of window and door styles, our products are able to suit any building project. Indeed, we work with many local contractors on all sizes of extension and refurbishment. We supply triple glazing units encased in uPVC, aluminium and hardwood. The Beaumont and Residence 9 lines offer a spectacularly authentic aesthetic, with timber effect appearance and joints. For Green or Eco projects, the Veka Infinity Window & Door profile system are produced using recycled materials within the core. Similarly, the internal reinforcements of Profile 22 products are manufactured with recycled composite materials.
In between the three panes of glass, Argon gas is used instead of either air or dry nitrogen. This gas is slower moving and therefore convection currents in the space do not flow as effectively. This means a decrease in the transfer of heat between the inside and outside of the panes.
Alternatively known as ‘warm edge spacer’ bars, this edging around the glass panes reduces heat conduction at the edge of the glass. This has the effect of both reducing condensation and improving insulation.
It’s important to use low emissivity (or Low-E) glass for your triple glazing. We choose to coat glass in a ‘soft coat’, which offers improved clarity and light transmission.
Managing Director – Mark Pearce talks about the benefits of triple glazing and warm edge Swisspacer
Why Triple Glazing?
The size of our triple glazed units is 44mm. This fits with many ranges of frame for windows or conservatories and provides over 40% improved thermal efficiency in contrast to ‘A’ rated double glazed units. When compared to the standard 36mm units provided by different suppliers, this triple glazing provides 25% better insulation performance. For some product lines, a slimmer triple glazed unit is required. So, by using Krypton gas rather than Argon gas we can produce a 28mm tripled glazed unit. Although this is a more expensive option, it is a solution which means you don’t compromise on the levels of insulation and sound proofing that triple glazing provides.
When you choose triple glazing, you will enjoy improved energy efficiency and better use of resources. As we commit to recycling old materials such as uPVC, aluminium, glass and card packaging, on all of our projects you know that your project is conscientious of resources, too.
We can supply both trade and offer supply only costs for the best glazing products in your area and also are in partnership with a local builder, who can tackle extensions and new-build projects.
Download our free Triple Glazing brochure
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.
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.
44mm sealed units filled with two 16mm cavities of argon gas. Argon gas is heavier than air, so acts as an insulator
Warm edge spacer bars made from a composite material to stop the cold-bridge across the unit.
Two coatings of low-emissivity glass (Low E). This is a microscopically thin coating that stops the heat from your house going outside.
Triple Glazing Prices Surrey
We pride ourself for the quality of our products, installation and after-sales service and can provide many recommendations in your local area. Our sales team give free, no-hassle quotations, without the sales gimmicks often used within our industry. KJM offers a range of double glazed & triple glazed windows, doors (including composite, patio french & bi-folding doors) and conservatories in the Winchester area.
Frequently Asked Questions
Will installing triple glazed windows cause overheating in the summer?
This is a common misconception, the level of solar gain is actually less than a double glazed unit due to the extra pane of glass and cavity. The overall energy balance of a triple glazed window will ensure that more heat is retained in the room in the colder months of the year.
This can cause a small problem in the winter months as the external pane of glass is not being heated from the house and this will result in external condensation in certain conditions. This will generally happen on a cold, clear and still winter’s nights and will normally clear quickly in the morning.
Are triple glazed windows worth it?
The cost of triple glazing is obviously more than double glazing. The u-value of a triple glazed window with the correct spacing between the panes of glass and argon gas offers up to a 50% improvement over A rated double glazing. If you are replacing your windows, building a new house or an extension then it is certainly worth considering.
The truth is it would take many years to repay the additional cost, but it will help save on your energy bills immediately and some would argue it would make your house more attractive to potential buyers if you decided to sell it. Houses in the UK have to have an energy performance certificate when being put up for sale.
How much do triple glazed windows cost?
As a rough guide triple glazing will cost on average around £150 extra per window over double glazing, based on one square metre of glass. This would be the average window size of a 1.2m square (4ft) UK window as it would have around one square metre of glass.
Are triple glazed windows better than double glazing?
Good quality triple glazed windows are up to 50% more thermally efficient than ‘A’ rated double glazed windows, so you would see an immediate effect on energy savings. If you home has older double glazed windows or even single glazing then the improvement would be huge, as an example the u-value of a single pane of glass is 5.5, the u-value of a 44mm triple glazed unit is around 0.5. This would considerably reduce condensation on the internal face of the glass and cold spots around the window and in your room.
What do triple glazed windows do?
For a long time windows in the UK were single glazed, in the 1980’s double glazing really took off. Back in the day the best double glazed window had a u-value of around 3 w/m²k. The glass units were made of two panes of normal glass with a metal spacer holding them apart. Triple glazed windows have changed the thermal performance hugely.
Today, the units are manufactured with three panes of glass, two of them will have a low-e coating, the gaps between the panes are filled with an inert gas commonly argon. Finally the triple glazed unit will have two warm edge spacers that stop cold transferring through the edge of the glass. This will normally reduce the overall whole window u-value down to less than 1 w/m²k. Do remember all triple glazing is not the same, generally with argon filled units, the gaps between the panes should be 16mm, any smaller and the efficiency will be less.
Are smaller triple glazed units available?
We can offer 28mm triple glazed units (2 x 8mm gaps) filled with krypton gas and 3 layers of 4mm glass, which achieves a centre pane U-value of 0.50 W/m2K. We offer this smaller unit to accommodate for the smaller units that we offer and for our customers who 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.