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Energy Efficient Glazing


Choose a high performance glazing option to maximise energy efficiency.

Keylite Roof Windows can be supplied with a wide range of glazing variants including thermal properties, tinted, frosted and self-cleaning glass.


Standard Glazing

Thermal (T)

  • 4mm toughened outer pane.
  • 20mm Argon gas filled cavity.
  • 4mm inner pane.
  • Warm edge glazing unit.
Glazing Type Ug W/(m2.K) Rw, r dB g Tv Tuv
T (Thermal) 1.0 32 59.8 80.1 35.0
Standard Glazing Thermal (T)

Hi-Therm (HT)

  • 4mm toughened outer pane.
  • 18mm Argon gas filled cavity.
  • 6mm inner pane.
  • Ideal safety glazing for windows below 800mm from finish floor level or windows above head height.
  • Improves sound reduction, safety and a reduction in the harmful effects of UV light.
  • Warm edge glazing unit.
Glazing Type Ug W/(m2.K) Rw, r dB g Tv Tuv
HT (Hi-Therm) 1.0 36 59.5 79.5 3.7

Triple (KTG)

  • 4mm toughened outer pane.
  • 10mm Krypton gas filled cavity.
  • 4mm inner pane.
  • 8mm Krypton gas filled cavity.
  • 4mm inner pane.
  • Triple glazing offers a lower U value.
  • Warm edge glazing unit.
Glazing Type Ug W/(m2.K) Rw, r dB g Tv Tuv
KTG (Triple) 0.6 32 49.8 70.9 19.9

Integral (I)

  • An integral blind sealed in the glazing unit, offering protection against moisture and dust.
  • 4mm toughened on outer pane.
  • 20mm Argon gas filled cavity.
  • 4mm inner pane.
  • Options for manual or electrical operation
  • Ideal for kitchens or bathrooms.

Note: U-Value is based on a centre pane measurement. Integral blind glazing unit is manufactured with thermal glazing and is not available with triple or Hi-therm glazing.

Glazing Options


Keylite QCP

Enhanced levels of safety and security.

  • P4A class glazing certified to class 2 burglary resistance under EN 1627.
  • A bottom handle provides additional locking.
  • All external screws are now 'non-reverse' reducing the risk of access occurring through the glazing pane.
  • Further ERA 806 key operated press-bolts installed in the bottom two corners for increased security.
  • Only available on timber Centre Pivot Windows.

Tint Options


Bronze (BRT)

Frosted (FR)

Self-Cleaning (SC)

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