Rules for selecting glazing
Insulating glass units

We are going to define simplified rules for the selection of glazing used on the exterior walls of buildings and likely to be exposed to sunlight and/or subjected to the effects of heaters, with regard to thermal breakage. The method below applies to glazing, whether or not fitted with blinds, shading devices or curtains, that is not directly exposed to the effects of heaters. Glazing with hole(s) and/or notch(s) is not covered in this document.