Product possibilities: Glass and acrylic are the most typical resources employed for secondary glazing. Acrylic is lighter and fewer costly but might not offer the same level of noise reduction. ❌ Skipping insulation underneath the heating technique → Heat will escape downwards as an alternative to upwards. Constantly use insulation boards. https://alec-monopoly86420.izrablog.com/35210482/acoustic-secondary-glazing-an-overview