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Replacing Your Old Inefficient Glass

Many older double-glazed units do not contain low-emissivity (low-e) glass or inert gases and are therefore not energy efficient. By replacing your existing window glass with low-e glazing, you can improve the energy efficiency of your home, reduce your monthly heating bills and help with climate change.

Our revolutionary Low E Glass Range is designed to prevent heat loss through your windows with an invisible coating that reflects radiated heat back into your home. Low-E-Plus1 can be retrofitted into any type of window frame, uPVC, timber or aluminium.

Our Low E Plus 2 glass, created exclusively for uPVC frames, is the only retrofit double-glazing to boast 2 heat retaining coatings, which dramatically reduces the heat transfer and reflects interior heat back into the home and keeps cold out. With a U-value as low as 0.9*, Low E glazing can achieve efficiencies that are similar to triple glazing.

By upgrading your old inefficient glazing with Low E glazing, you can reduce your heating bills and vastly improve the warmth and comfort of your home.

*U-values are determined by the width of the cavity.

How to quickly identify if your glass is inefficient

Old, cold double glazed units that DO NOT have a heat-retaining coating or argon gas between the panes, is very inefficient when it comes to heat retention. Therefore, in order to identify the glass is inefficient check for a silver spacer bar.

Original Low-E-Plus Glass

One Low-E coating. U-values from 1.0 W/m2.K.
Suitable retrofitting into for existing and new uPVC, Timber and Aluminium window frames.

New Low-E-Plus 2 Glass

Two Low-E coatings. U-values from 0.9 W/m2K.
Suitable retrofitting into for existing uPVC window frames only.

Low-E-Plus2 diagram
Low-E-Plus2 Benefits

The Benefits

Double-glazing as thermally-efficient as triple-glazing

  • ​Up to 68% more efficient than standard double glazing​
  • U-values from​ 0.9 W/m2K*​
  • ​Improves the warmth and comfort of your home
  • Little or no redecorating required.
  • Saves on heating costs
  • Easily retrofitted into existing frames
  • Costs up to 50% less than new windows
  • Kinder to the environment

* The u-value will be determined by the thickness of the cavity (i.e. the gap between the two panes of glass)

New windows and doors featuring Low-E-Plus also available