High Performance

E13 Delivers higher Standards

At E13 Windows, we believe that the future of Construction lies in Energy Efficiency - where buildings require less energy input for heating and cooling.

Since 2011 we have been at the forefront of Thermally Efficient Windows and have continued to push boundaries where it comes to high performing glazing options, especially Triple Glazing.

As Passive Housing principles gain traction in New Zealand, we continue to lead the way in window joinery and have built strong relationships with industry experts.

We understand the future of windows and are well placed to cater to your project.

Pacific60 Render v2

Triple Glazing

Extreme Performance

Three is better than Two, and while Triple Glazing is still not seen as mainstream in NZ, E13 Windows have become specialists in harnessing what it can offer.

With an extra pane of glass comes the added benefit of another surface to apply high performing Low E coatings, as well as another cavity between panels for even further insulation, not to mention the added bonus of noise reduction.

We partner with our suppliers to bring leading solutions to the age-old problem in NZ, where the windows were the weak link in insulation.

See the Data

Blower door diagram Office

Air Tightness

Savings long term

A fundamental principle of Passive Housing, an air tight home is easier to heat/cool and ensures building products last longer, meaning less energy is used and less maintenance is required.

As warm air moves through your home, it finds gaps in materials and cool surfaces to condensate upon, promoting mould build up. Sometimes these surfaces are unseen or covered, and over time can lead to costly repairs.

E13 Windows continues to lead the industry, partnering with local experts, achieving high level results.


Thermal Break v2

Thermal Breaks

Improved Insulation

Another basic principle of Passive Housing is to have any Thermal Breaks forming a continuous line in the home - so that they can't form a "Bridge" over each other. For windows this means having the Thermal Break align with the wall insulation, or recessing the window frame as much as possible.

This decreases the Dew Point of a window, enabling further reduced condensation but also decreasing the opportunity for mould to form.

At times this is difficult to achieve under NZ building standards, however you can best achieve this with our systems and how the Thermal Breaks align.

3 Rules of Thermal


Don't just take our word for it - See what the Experts have to say