Bromyard Glass

U Values

Units with soft coat Lowe Glass, Argon Filled The Glass Sealed Unit.

Double     Triple  
4-6-4(14mm) 2.2   4-6-4-6-4(24mm) 1.6
4-8-4(16mm) 1.8   4-8-4-8-4(28mm) 1.3
4-10-4(18mm) 1.6   4-10-4-10-4(32mm) 1.2
4-12-4(20mm) 1.4   4-12-4-12-4(36mm) 1.0
4-14-4(22mm) 1.3   4-14-4-14-4(40mm) 0.9
4-16-4(24mm) 1.2   4-16-4-16-4(44mm) 0.7
4-18-4(26mm) 1.2   4-18-4-18-4(48mm) 0.7
4-20-4(28mm) 1.2   4-20-4-20-4(52mm) 0. 7

Warm edge bar used on 8/10/12/14/16/18/20 cavities Aluminum bar use on 6mm.


Units with soft coat Lowe Glass, Argon Filled Windows in Wood or Pvcu Frames

Double     Triple  
4-6-4(14mm) 2.4   4-6-4-6-4(24mm) 2.1
4-8-4(16mm) 2.1   4-8-4-8-4(28mm) 1.8
4-10-4(18mm) 2.0   4-10-4-10-4(32mm) 1.6
4-12-4(20mm) 1.9   4-12-4-12-4(36mm) 1.5
4-14-4(22mm) 1.9   4-14-4-14-4(40mm) 1.4
4-16-4(24mm) 1.8   4-16-4-16-4(44mm) 1.3
4-18-4(26mm) 1.8   4-18-4-18-4(48mm) 1.3
4-20-4(28mm) 1.8   4-20-4-20-4(52mm) 1.3

Warm edge bar used on 8/10/12/14/16/18/20 cavities Aluminum bar use on 6mm

The above information as been unraveled from various publication that do contradict itself.
This is our interpretation but Bromyard Glass Ltd accepts no responsibility that they are correct.

It must be noted that latest Building Regulations(2012) do not take into account U-Values only. On untested windows a minimum of 4-16-4 Lowe sealed unit, Argon filled with warm edge spacer bar is required.

You could assume that minimum triple glazed unit would be 4-10-4-10-4(32mm) Lowe sealed unit, Argon filled with warm edge spacer bar is required but there is nothing that is been written down and can-not be taken as correct. Your Building Inspector will advise.




U Values
Bromyard Glass

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