Highest Quality Double Glazed Units

At mistedwindows.com we only install the best double glazed units available on the market today.

We work closely with our suppliers who hold the highest mandatory production ratings available on the market today.

Over 300 companies in the UK hold BS EN 1279-2 but only 18 companies hold part BS EN-1279-3 ... and our manufacturer is one of only 3 based in the north of England!

Our energy-efficient double glazed products are manufactured to EN 1279-3.

Even more impressive is that our suppliers are one of very few in the North of England who hold this license.


This puts our suppliers in the top 6% manufactures in the UK for quality.


Ask our competitors if their double glazed units have this manufacturer rating (EN 1279-3).


This image compares the heat loss from:

  • Single Glazed (red) - 200+
  • Normal Double Glazed (green) 80+
  • Pilkington EnergiKare (Orange) <25


EnergiKare is nearly 4 X more efficient!

Measurements are in KWh/m2/a (Electricity units consumed per year for each square meter).



  • Improves the energy efficiency of your home
  • Reduces the amount of energy you use
  • Saves you money on your heating bills
  • More effective than single glazing or standard double glazing
  • Provides you with the quality and reassurance you would expect from a leading brand
  • Manufactured to the highest European quality standards

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