When compared to traditional sandwich panels, triple layer sandwich panels include another layer, which is usually for some type of reinforcement or insulation. It is rare to find such a panel which offers better soundproofing, additional strength and optimally, insulation. The core can be made from weak materials such as foam, rock wool, or even honeycomb structures. For some cold regions, triple layer construction is effective for conserving energy by reducing heat transfer. In high noise areas, they effectively block external noise and make quiet interior spaces.