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.

Optimised for energy-efficient insulating glass units, it reflects heat to reduce heating costs while maintaining high light transmission.

Reduce heat loss, increase solar gain, and lower heating bills with our advanced insulating glass units, available nationwide.

From new homes to older traditional buildings, Pilkington energiKare™ Triple delivers the best possible energy efficiency surpassing the best performing double glazed Insulating Glass Units (IGUs). Advances in technology have made windows a larger contributor to the energy efficiency of new homes.

Pilkington Optifloat™ Clear is premium, environmentally responsible high‑quality float glass offering exceptional light transmission, durability and recyclability. Ideal for glazing, IGUs, partitions, and available toughened or laminated for safety and performance.

** g-value depends on which thermal insulation glass is selected as inner pane (all based on 4 mm thickness) For higher g-values please refer to our Thermal Insulation glass product range

We offer a range of products which can provide thermal insulation to reduce heat loss in winter: Superior light transmittance with a highly neutral colour. It is the ultimate in thermal insulation for any situation where excessive heat loss is a concern.

Thermal Insulation Improves the energy efficiency of domestic or commercial buildings whilst enabling the extensive use of glass and the benefit of passive solar gain.

We offer a range of low-e energy-efficient glazing to suit every type of property, from a modern home to an older traditional styled home.

Our updated Pilkington OptiView™ Range provides the best anti-reflection performance available in glass while allowing additional features like security and thermal insulation.