2. Edge Seal
2.1 Standard composition
2-Sheet insulated glass with, aluminium spacer bar – bent corners, with dual seal system, primary seal of Polyisobutylen and secondary seal of Polysulphide.
2.2 UV-resistant edge seal / Silicon Structural Glazing
It is possible to achieve a gas-filled UV-resistant cavity using silicone as the secondary edge seal and CHROMATECH PLUS spacer bars.
The requirements of EN 1279-2 are fulfilled by such insulated units. The requirements given in this Eurocode have been substantiated in test report TC-RAP-06-18364
Warm-Edge – Thermally improved spacer in accordance with EN 10077-1
In addition to conventional aluminium spacer bars, the CLIMATOP range of insulated units are also available with thermally improved materials. This „Warm-Edge“ system reduces the warm bridge at the edge of the unit and improves the UW-Value of the window. Simultaneously the possibility of condensation at the edge of the unit is minimized or even eliminated.
The window-integral warm bridge is characterized by the linear thermal transmittance coefficient ψfg or „ψ-Value“ and is taken into account when calculating the UW-Value of the window.
For fixed glazing, e.g. in a transom/mullion framing system – different values are achieved. These are given as ψmg (Mullion) and ψtg (Transom).
The preferred method for determining the linear thermal transmittance coefficient (ψ) is a calculation to EN 10077-2. Such calculations are to be carried out by the framing manufacturer, whereby the value to use for CHROMATECH PLUS is 0,004 (to EN 10077-1, E3). This is approximately 40 % better than the minimum required value of 0,007.
||Linear thermal transmittance coefficient Ψ W/m.K
for CLIMAPLUS ULTRA N
|Metal with thermal break
CHROMATECH PLUS can reduce the Uw-Value of windows – dependent on the frame material – by approx. 0,1 W/m².K. The tendency toward condensation in the insulated glass edge seal is visibly reduced.
For window frames it is possible to use simplified standard values in accordance with appendix E2 and E8 of the above mentioned Code.
CHROMATECH PLUS black is available for cavity width of 10, 12, 14, 16, 18, 20 mm.