Sternfenster Window Systems - Deceuninck Profile

Global warming, is quite literally, a hot topic. We all need to do our part to help reduce Carbon emissions and take responsibility for reducing our impact on the world’s natural resources.

With the rising cost of fuel, not to mention reducing your carbon footprint, the issue of energy efficiency is an important factor to consider when improving your property.

Did you know that up to 30% of heat in a home is lost through its windows and with the installation of energy efficient replacements this can reduce by a staggering 94%, helping you to save energy and money on your heating bills whilst making your home more desirable.

Recent calculations by the Glass and Glazing Federation show that there are significant savings to be made from upgrading to energy rated windows, in some cases up to £697 per year. Log on to and use the "carbon calculator" to find exactly how much you could be saving each year.

By making buildings more energy efficient with windows, we can reduce energy use and prevent energy waste.  In the UK alone, fitting better windows could reduce emissions by almost 5 million tonnes.

All our windows are A rated, with doors, patios and vertical sliders complying to
Document "L" Energy Rating

All windows are available with the following features:


  • High security internally beaded
  • Sculptured or Chamfered profile
  • 28mm double glazed sealed units
  • Charcoal grey super spacer bar
  • High thermal performance glass
  • U Value of 1.4
  • Recommended by the Energy Saving Trust
  • Kitemarked to British Standard BS 7214, BS EN 1279 and BS EN 12600
  • Improved security to Secured by Design standards

Other benefits of our energy efficient window range:

  • Using a warm edge spacer means the internal glass is warmer, which can help reduce condensation by upto 70%
  • Less condensation will reduce the build up of mould and bacteria around the window
  • Warm edge spacer bar also helps reduce noise transmission by up to 2dB
  • Energy efficient windows will help reduce your carbon foot print by reducing CO2 emissions, not to mention saving you money!


Here at Winstanley Windows we are pleased to be doing our part to help conserve the environment by having in place a rigorous recycling policy.
In order to adhere to this we separate the waste brought back to our yard, as shown in the images below, into 3 key elements glass, wood and plastic.

Berryman have been world class in glass recycling for the past 90 years and have pioneered new methods of collection and treatment to make sure that the glass they recycle can be put to a useful second life, from closed loop systems to make new bottles and jars to construction products , insulation and many other useful products. 


All of our wood is  recycled into making kitchen cupboards and other home furniture products which are constructed from pulped wood. 


Last but not least all uPVC collected is used for such things as plastic containers, bottles and other re-useable products.


Tel:  01303 249048
Fax: 01303 244443

  [email protected]