G & B Windows (International) Ltd
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Pilkington K Glass
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What is Pilkington K Glass?

The UK's leading solution for thermal insulation in homes and public buildings, Pilkington K Glass™ is a low emissivity coated glass which is easily stocked, processed and installed.

Pilkington K Glass™ usually forms the inner pane of an Insulating Glass Unit (IGU) such as the latest energy efficient glazing, Pilkington energiKare™. The coating reflects heat back into the room whilst also letting in free heat from the sun known as passive solar gain. Pilkington K Glass™ helps windows to achieve high Window Energy Ratings to demonstrate compliance with energy saving Building Regulations Part L.

NEW Pilkington K Glass™ OW - with enhanced solar gain and brighter appearance, ideal to help achieve improved Window Energy Ratings.

The benefits:


Recognised by the Energy Saving Trust as a significantly effective measure for achieving energy efficiency.


Ideal for conservatories - helps to keep an unheated conservatory comfortable for a greater part of the year than ordinary double glazing.

arrow Allows you to make the most of your conservatory all year round.

Helps to achieve high Window Energy Ratings when combined in a suitable framing system.


Easily helps to meet and exceed the requirements of Building Regulations concerning energy efficiency.


Systems specifically designed for fast, easy fabrication and fitting.


Can be toughened or laminated for safety and greater security.

How it works:

The glass in your windows absorbs heat then radiates it again on the colder, outside, surface. Pilkington K Glass™ has a so-called low emissivity coating which is positioned on surface 3 (counting from the outside) of the Insulating Glass Unit (IGU).

The low emissivity coating is a poor radiator of heat. So the heat absorbed by the coated glass does not travel across the air gap to the outer pane and the cold outside world. Instead the coating reflects the heat back into the room.

Windows incorporating Pilkington K Glass™ allow heat from the sun through and keep heat inside, making it easier and more cost effective to keep buildings warm.

About our windows...

Our best range of double glazing windows - Secure and efficient.
About our doors...

Our exterior doors combine security and elegance with satisfaction.
About our conservatories...

Our best range of double glazing windows - Secure and efficient
Pilkington K Glass
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Johnson Street
Southall, Middlesex (UK)

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