Embodied carbon footprint reduction in façade design has come to the forefront over the last five years, alongside the carbon-in-use performance that already was a focus area prior to that period. This has led to an increasing need for quality data and improvement options regarding embodied carbon not only for major façade components, e.g. concrete, steel, glass and aluminum, but also for façade elements that constitute a relatively minor part of the façade mass. In the case of glazing, these elements include e.g. sealants, interlayers, and IGU spacers. This contribution maps how PVB interlayers play a role in reducing embodied carbon in façade design, covering the availability and transparency of data for interlayer products, exploring options for direct improvement of carbon footprint, and demonstrating how interlayers can reduce glass mass and potentially support structures to lower overall carbon impact. In addition, a perspective on PVB recycling is provided.