Thermal Insulation and Window Energy Ratings. Heat loss is normally measured by the thermal transmittance or U-value, usually expressed in W/m 2 K. In its most basic terms, the lower the U-value, the greater the thermal insulation, however, the amount of free heat energy from the sun, the solar gain or g-value can also have a big impact.

Pilkington K Glass™ is the UK’s leading thermal glass brand. Established for over 30 years and easily stocked, processed and installed, it has become the trusted solution for meeting Building Regulations concerning energy efficiency.

Pilkington K Glass™ S is our latest high performance, low-emissivity soft coated product which offers excellent thermal insulation when incorporated within an Insulating Glass Unit (IGU). It has a highly neutral appearance with optimal solar heat gain, thermal insulation and light transmission to provide the highest Window Energy Rating (WER ...

Pilkington energiKare™ is the name given to our range of double and triple glazing used to improve the thermal efficiency of homes. It reduces the amount of heat lost through your windows and can also allow more heat energy from the sun in through the glass.

Pilkington energiKare™ Designed to meet the growing demand from homeowners to reduce energy loss through windows

High performance triple glazed units optimise the balance between U-value, the thermal performance of the glass, and g-value, the proportion of solar energy through the glass to retain the warmth within the home; Where there are suitable framing systems, it can be used in existing homes as a glass-only upgrade

Benefits. Pilkington Pyroclear ® is an integrity only product for 30 and 60 minutes, (E30 and E60) to BS EN 13501-02; Integrity with reduced heat radiation (EW60) is achieved by using Pilkington Pyroclear ® Plus in an insulating glass unit (IGU) or a monolithic laminated glass; Unique product design and system description, manufacturing process and quality assurance system

Pilkington Optitherm™ S1 Plus is an off-line coated, single stock product, offering superior thermal insulation performance with Ug-value of 1.0.

In its most basic terms, the lower the U value, the greater the thermal insulation. U values for insulating glass units are determined in accordance with BS EN 673. An insulating glass unit comprising 4 mm Pilkington Optifloat™ Clear outer pane, 16 mm argon gas-filled cavity and 4 mm Pilkington K Glass™ inner pane has a centre pane U value of 1.5 W/m 2 K.

For applications where highly efficient thermal insulation glazing is required, the occurrence of condensation can be a problem, especially in the spring and autumn months. New Pilkington Anti-condensation Glass is designed to prevent the onset of condensation and improve the view through your windows.