Introducing our new BioFoam™ Insulating foam feature. A low density insulating foam that is biodegradable is an available feature on all 8000 Series windows. Overall thermal efficiency up to 8 percent can be achieved with our BioFoam™ Insulating foam feature.
The insulated glass unit (IGU) is one of the most important aspects of the functionality and thermal performance of a window. When vinyl windows first started being produced they were made with a metal spacer.