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Pilkington K Glass™
Pilkington K Glass™ is the original on-line coated low-emissivity glass designed to improve the thermal performance of insulating glass units (IGUs). The coating reflects a proportion of long-wave heat radiation back into the building while still allowing solar energy to enter through the glazing.
Typically positioned as the inner pane of a double glazed unit, Pilkington K Glass™ contributes to improved energy performance in residential and light commercial windows. When incorporated within an IGU, it can support compliance with energy efficiency requirements such as Approved Document Part L, depending on the complete window system specification.
The durable on-line coating is applied during the float glass manufacturing process, allowing the glass to be handled and processed in a similar manner to conventional float glass. This provides flexibility for processors manufacturing insulating glass units for new build and replacement window applications.
Ready to specify Pilkington K Glass™?
Contact your local Pilkington UK representative today for technical guidance, test reports, samples, or details of your nearest UK supplier.
The Declaration of Performance (DoP) for our products can be accessed via www.pilkington.com/ce. Supporting test evidence for the DoP can be requested via enquiries@pilkington.com.
April 2026
Version UK:2.1.1
Key Features
- On-line coated low-emissivity glass designed to reflect heat back into the building.
- Typically used as the inner pane within insulating glass units (IGUs).
- Durable hard coating applied during manufacture.
- No edge deletion required during IGU manufacture.
- Can be processed, cut and handled in a similar manner to standard float glass.
- Available as a single stock product suitable for annealed processing and further safety processing such as toughening or lamination.
Applications
- Residential double glazing for new build housing.
- Replacement windows and retrofit glazing upgrades.
- PVC-U, timber and aluminium framed window systems.
- Conservatories and orangeries where improved thermal performance is required.
- Domestic refurbishment projects seeking improved window energy performance.
- IGUs designed to contribute to Window Energy Rating (WER) performance targets.
