- Acoustic insulation index : R
- Cekal acoustic classification
- Self-cleaning glass
- Scratch resistant glass
- How glass breaks
- Safety classification
- Vandalism resistant glass
- Break-in resistant glass
- BRS bullets resistant glass
- BRNS bullet resistant glass
- SG & SGNS bullet resistance
- Fire resistance
- Reaction to fire
- Thermal insulation classes
- Light Transmission
- Thermal transmittance
- Solar factor g
- Triple glazing
- Warm edge
All about glass > Cekal thermal classification
Cekal, the French glass certification association, has defined 10 TR ratings from TR1 to TR10, according to the glazing unit thermal transmittance Ug:Cekal Thermal Reinforced ratings TR
| TR* | TR1 | TR2 | TR3 | TR4 | TR5 | TR6 | TR7 | TR8 | TR9 | TR10 | TR11 | TR12 | TR13 | TR14 |
|
Ug en W/m².K |
1.9 | 1.8 | 1.7 | 1.6 | 1.5 | 1.4 | 1.3 | 1.2 | 1.1 | 1.0 | 0.9 | 0.8 | 0.7 | 0.6 |
* An insulating glazing unit is TR if its thermal transmittance Ug is < or = to 2 W/m².K