The EuroGlazing add-on window system

Our unique double glazing add-on system reduces the transfer of noise and heat through your windows. Our windows are specially manufactured to meet your specific size, glass thickness and hinged opening requirements.
This glazing system is used with great success in Europe and is well suited to large windows found in older style buildings. We take care to carefully match any pane joins with the existing framing creating an affordable and highly aesthetic add-on glazing system.

How to get specific insulating effectiveness

  • For noise reduction – Greater individual glass thicknesses, wide air gap of 80 – 120mm between panes of glass, good air-tight seals, two different glass thicknesses in combination with the wide air gap. We recommend 8mm thick add-on glass.
  • For less solar heat gain – Greater individual glass thicknesses, narrow gap of 6 – 16mm between panes of glass, SmartGlass, low-e glass, low conductivity like timber frames, good air-tight seals. Reflective glass, external shade.
  • For keeping heat in – Greater individual glass thicknesses, narrow gap 6-16mm between panes of glass, SmartGlass, good air-tight seals. Heavy drapes or curtains.

 

Technical glass for noise reduction

In order to create better sound insulation, you need to estimate (or measure) the level of noise outside, then subtract from that the existing level of noise inside, giving your current sound level. Then using a table similar to below, you can estimate what the additional benefit of different add-on class will further subtract from the sound levels inside. Bear in mind that the framing material and any other air leakages will let more noise in.

Sound insulation data (dB)  Known as weighted reductions (WR)

window glass dB reduction chart

Note that the human ear has the following limitations:

  • Under typical field conditions the ear cannot detect a change of 1–2dB;
  • The ear will not pick up a change of 3dB if there is a time lapse between the two sounds and they are of moderate or low intensity;
  • A change of 5–7dB can always be detected;
  • For every 10dB increase/decrease in intensity we perceive the sound as being a doubling/halving of the noise level.

Sound reduction:

  • Sound reduction will improve with increased glass thickness due to the greater mass involved. That’s why we offer 8mm thick glass;
  • Sound reduction will improve with the use of glass/airspace/glass combinations, but the performance is dependent upon the width of the airspace. An airspace of 80mm is generally regarded as a minimum for reasonable benefits at medium to high frequencies.

So by installing our 8mm sealed EuroGlazing inside your existing closed window, the total Sound Reduction goes up from less than 30dB ( 3mm glass) to between 40 and 50dB, depending on the air gap.

 

Acoustic Engineer

For peace of mind and help ascertaining what acoustic improvements are possible, we recommend you engage an Acoustic Engineer. They can do accurate measurements and look at your whole house/workplace to see where the noise “leaks” are. We work with  them from time to time, so if you don’t have one already, we can put you in touch with somebody independent to help you out.

 

Size of the air gap between panes of glass

  • The thermal insulation of double glazing increases with gaps of 6mm to about 16mm, and then begins to decline due to convection currents moving the air around between the panes.
  • With spaces 80mm – 120mm, the soundproofing effects are superior. With 300mm you get optimum sound reduction.
  • Either way, adding a sealed second pane of thick glass of say 8mm inside your existing window, plus the air gap will add up to impressive improvements of your new EuroGlazed window system.

 

Easy to open and clean

If you are happy to go with an Add-On/secondary window rather than replacing with expensive new IGU’s (Integrated Glazed Units), you will likely be looking at PVC options which attach with magnets or permanently fitted inner glass which can’t be removed for cleaning or wiping off condensation.

This is really where EuroGlazing shines! Our thicker glass FRAMELESS windows are HINGED to your wall or existing window frames, simply open them to get fresh air and clean the glass. How easy is that?

 

The glass types:

  • We typically offer 8mm thick toughened float glass which has a WR rating of 34dB. Our toughened glass meets the Australian Standard AS 1288-2006 – Glass in Buildings-Selection & Installation. 6mm Standard toughened safety glass is also available.
  • Improved performance THERMAL glass like Viridian SmartGlass™, ComfortPlus™ or low emmisivity (low-e) glass can be used as a EuroGlazed secondary windows, though they are much more expensive.

 

Our unique hardware:

Stainless Steel Hinges, Spanjolet Locking Handle, Button Handle, Twist Latches, Aluminium Channels and Air-tight custom-fit Seals.

 

Typical glass configurations:

  • One Pane, hinged on side or top.
  • Two Panes hinged on sides, or top & side. Or a side hinge to open for cleaning and a lower horizontal glass-to-glass hinge to open for ventilation. (see gallery)
  • Three Panes of 8mm glass for large windows, the top window is easy to “crack open” to allow ventilation as required.
  • Where two Panes meet in the middle, we use the Spanjolet Locking Handle.

 

Glass performance data terms

If you need some clarification on the difference between a UV, SHGC, Rw and U Value, click here for our list of glass performance data terms

 

Technical glass for climate control

One way to reduce solar gain, glare and UV ingress is to specify one of the many available TINTED glasses. As long as the glass you select comes in 6/6.5 or 8/8.5mm thickness, we can use it for your EuroGlazed window. This is a premium product. (see gallery)

Alternately, there are more specilaised low-emissivity (low-E) coatings on glass which are microscopically thin metal layers that are deposited on a window surface to help keep heat on the same side of the glass from which it originated. This is a premium product.

Where the metallic coating is on the outward facing side of the EuroGlazed window, the delicate surface is protected within the sealed air gap. We can use SmartGlass: a range of single glazed toughenable Low E glass selected for Australian climate conditions to assist in achieving energy star ratings for home designs, whilst still capturing natural light and views. See http://www.smartglass.com.au/more/. This is a premium product.