At Stax ICF we can facilitate all single storey and two storey extensions. ICF is an excellent solution for building an extension because it integrates seamlessly with existing structures while significantly improving energy efficiency and structural performance. The solid reinforced concrete core provides exceptional strength and durability, making it ideal for adding new floors or expanding outward without compromising stability. Since the system combines structure and insulation in one step, it can streamline construction timelines and reduce long-term maintenance, making it a practical choice for residential or multi-unit extensions.