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The Guardian ClimaGuard® range is designed for use in insulating glass in residential, commercial and architectural projects. The low-emissivity coatings provide excellent thermal insulation with a neutral appearance. ClimaGuard® coated glass can be combined with clear float, SatinDeco, LamiGlass and SunGuard Solar ranges of Guardian products to provide sophisticated solutions for energy conservation.

Further processing:

  • Cut to size.
  • Toughening.
  • Heat soaking.
  • Heat strengthening.
  • Laminating.
  • Drilling.
  • Notching.
  • Edgeworking.
  • CNC shaping.
  • Manufactured into suitable double or triple glass insulating units.


  • Curtain walling.
  • Edge-worked.
  • Manufactured into suitable double or triple glass insulating units.


  • Excellent thermal insulation performance in insulating glass units.
  • Low U-values may be used to satisfy national and local building codes and regulations.
  • High light transmission exploiting the use of natural daylight.
  • May be utilised to provide optimum solar gain.
  • Readily available and easily processed.
  • Neutral appearance.
  • Reduces cold down draughts increasing usable space in rooms.
  • Satisfies Window Energy Rating (WER) requirements.


Guardian Europe has ISO 9001 accreditation for the manufacture of float glass at all of its European based float glass plants. Guardian Low-emissivity coated glass complies with the requirements of EN 1096-4: ‘Glass in Building – Coated Glass’. Guardian also has ISO 14001 Environmental Management System standard.

Standard product features


- Manufacturer's standard (other sizes available):

  • Jumbo: 3210 x 6000 mm.
  • Split: 3210 x 2250–2550 mm.



- ClimaGuard® A+:

This is for use in residential or commercial buildings. It offers a U-value as low as 1.2 W/m²K in an argon filled double glazing unit and is ideal where window energy ratings apply and high solar gain is factored as a requirement, utilising high g-values above 71% with clear float and 73-74% with low iron glass.

- ClimaGuard® DS:

This range is for use in residential building. It offers a U-value as low as 1.3 W/m²K in an Argon filled double glazing unit.

ClimaGuard® A 1.1

Specifically designed for use in architectural buildings. It has a very neutral appearance and can achieve U-values of 1.1 W/m²K in an argon filled double glazing unit.

- ClimaGuard® A 1.0:

Lowest U-value, low-E glass range ideal for use in architectural buildings. It offers a U-value as low as 1.0 W/m²K in an Argon filled double glazed unit. By utilising a high light transmission of 72% and mid range solar factor of 54% this product is ideal for specifications like the Passivhaus window specification where it provides a manageable level of solar heat gain.


  • ExtraClear float: 4, 6, 8 and 10 mm. 12 mm on special request.
  • ExtraClear Laminated: 6.4, 6.8, 7.5, 8.4, 8.8, 9.5, 10.4, 10.8, 11.5, 12.4, 12.8 and 13.5 mm. Other glass and PVB interlayer thicknesses available – contact manufacturer for details.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-65-40/315 Heat strengthened glass
45-65-40/310 Annealed glass
45-65-40/335 Thermally toughened glass

Product specification

An important note about specifying



Guardian Glass UK Ltd


+44 (0)800 032 6322

Product reference



 - Glass:
[ExtraClear Float]
[ExtraClear LamiGlass]
 - Coating:
[ClimaGuard® A+ (Typical 4-16-4 double glazing performance: 1.2 U-value, 73–76% g value, 80% light transmission)]
[ClimaGuard® DS (Typical 4-16-4 double glazing performance: 1.3 U-value, 69% g value, 70% light transmission)]
[ClimaGuard® A 1.1 (Typical 4-16-4 double glazing performance: 1.1 U-value, 65% g value, 79% light transmission)]
[ClimaGuard® A 1.0 (Typical 4-16-4 double glazing performance: 1.0 U-value, 54% g value, 72% light transmission)]


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Manufacturer details

Tom Pudding Way,
East Riding of Yorkshire, DN14 8GA
Tel +44 (0)800 032 6322
Fax +44 (0)1405 726999
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NBS National BIM Library