A hollow insulated block, where rice husk ash and rice husk insulation mixed with aluminous cement served as the binder, has been examined [19]. Rice husk is notably characterized by its high silica content compared to other agricultural residues [10]. The promising results observed in other studies advocate for further exploration of rice husk's properties and its potential applications in energy-efficient construction [17]. Considering the potential of this agricultural residue, it is essential to investigate its integration into broader contexts, such as industrialized construction systems. Industrialized construction represents a transformative approach that integrates technological solutions to automate processes, enhance supply chain efficiency, and promote sustainability [20]. Despite challenges related to initial invest costs, the limited integration of digital tools, and the need for specialized expertise, this construction approach has demonstrated strong potential in improving efficiency, product standardization, modularization and mass production. Within this broader framework, there is a growing need for further research into environmentally friendly and economically viable insulation materials [21]. Among these systems, modular construction stands out for its ability to reduce material waste, energy consumption, and environmental impact while also decreasing construction time and cost. Consequently, it is increasingly recognized as a promising strategy for sustainable development in the construction industry [22]. Moreover, modular systems facilitate mass customization by allowing products to be tailored to specific consumer requirements without incurring substantial additional costs or delays [23]. The Skylar 250 system, an open-source construction model and the primary system used in WikiHouse, is a modular, industrialized solution designed for rapid assembly, accessibility, and low energy consumption. Using subtractive manufacturing, this system enables efficient and precise prefabrication, which significantly reduces both construction time and material waste [24]. A notable advantage of this system is its lower environmental impact compared to conventional construction methods. It generates significantly fewer greenhouse gas emissions due to its reduced air conditioning demand, estimated at approximately 2000 kWh/year, compared to about 4200 kWh/year which is required by traditional systems [25]. Previous studies involving modular construction systems have demonstrated that the incorporation of sustainable insulation materials, such as wheat straw, can effectively meet thermal performance standards, achieving a thermal transmittance of 0.45 W/m\({}^{2}\)K for walls. In addition, energy simulations have shown that optimized modular designs using sustainable insulation can significantly reduce total energy demands, reaching values as low as 55 kWh/m\({}^{2}\) year [25]. Other research conducted in Temuco, Chile reported heating energy demands ranging from 40 to 82 kWh/m\({}^{2}\) year in buildings where thermal insulation was improved, regardless of the specific material used. These results represent substantial improvements when compared to buildings without enhanced thermal insulation [26]. These findings emphasize the importance of passive design strategies in reducing energy consumption. Furthermore, the integration of appropriate thermal insulation materials, particularly those based on natural fibers, can enhance energy efficiency and indoor thermal comfort, ultimately benefiting homeowners and contributing to the reduction in environmental impacts associated with construction [25; 27]. In this context, rice husk fiber, a renewable agricultural by-product, offers a promising alternative for building insulation. Its natural, biodegradable properties make it suitable for modern construction systems, particularly for use in building components such as walls and roofs.