Discover Pilkington Optitherm™ S1 Plus | a high-performance low-emissivity glass achieving a Ug-value of 1.0 W/m²K in double-glazed units. Ideal for energy-efficient residential and commercial applications, it offers superior thermal insulation, high light transmission, and a neutral appearance.

Pilkington Optitherm™ S1 Plus is an off-line coated, single stock product, offering superior thermal insulation performance with Ug-value of 1.0. Our own range of energy-efficient double glazed units for use in domestic applications.

When fitted with Pilkington Activ™ combined with a thermally efficient glass such as Pilkington Optitherm™ S1 Plus, your transformed conservatory will be warmer in the winter, cooler in the summer and will look cleaner than ordinary glass.

Benefits of installing energy rated windows: Choosing windows incorporating a low-e glass such as a glass from the Pilkington K Glass™ or Pilkington Optitherm™ ranges helps to prevent heat from escaping through the windows, reflecting it back into your home.

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.

Better insulation and no cold spots near windows make Pilkington K Glass™, Pilkington K Glass™ S and Pilkington Optitherm™ S1 Plus an excellent choice for conservatories, because thanks to a special low emissivity coating on the surface of the glass, it lets the sun's rays through, but reflects heat from fires and radiators back into your ...

Specify your projects quickly and easily with Pilkington Spec-it! If you know the target U and g values for your project, then Spec-it! can help you select the right product.

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

Reduces solar heat gain and offers high levels of natural light to provide comfortable and pleasant environments in which to live and work. The increased use of glass in architecture today makes it imperative to consider the comfort of a building's occupants.

In thicknesses above 6 mm, it can be used for a variety of commercial applications where superior strength, greater spans, reduced deflection, high daylight transmission and noise reduction are required. Pilkington Optifloat™ Clear can be toughened or laminated for impact safety and security.