Characteristics
Oldcastle Glass® insulating glass units are
independently tested and certified according to
North American standards for quality and
performance. Our IG unit constructions pass the
highest level (Class CBA) of the ASTM E773/E774
specification. The tests are validated by the
Insulating Glass Certification Council (IGCC)
which sponsors the certification program in the US.
The Insulating Glass Manufacturers Alliance is
responsible for IGMAC certification in Canada.
