<p>The Toppila Pulp Mill represents Alvar Aalto’s first major project in the field of industrial architecture and is among the few of his works in northern Finland still accessible to the public. In recent years, its adaptive reuse has attracted growing public attention, and its heritage value has become increasingly recognized. Against this backdrop, this study focuses on the wood-chip storage silo within the mill complex, a structure distinguished by its pronounced architectural character. The paper systematically traces the silo’s trajectory from design and construction through operation and decline, to the evolution of its conservation strategies and contemporary reuse, with the aim of exploring how historical values can be preserved while accommodating present-day functional needs. The findings highlight that maintaining the functionalist design logic and authenticity of the silo is essential to safeguarding its core significance. By analyzing its architectural features and multidimensional heritage values, the study reinforces the strengthens the coherence of the knowledge framework underlying its documentation and interpretation. Furthermore, it underscores that the conservation of modernist industrial heritage extends beyond the material preservation of physical fabric to encompass the reconfiguration of architectural discourse and the reattribution of social meaning. Framed within the principles of minimal intervention, reversibility, and recognizability, this research provides critical insights into sustainable and socially oriented approaches to the conservation and renovation of industrial heritage, offering particular relevance for the preservation, activation, and community revitalization of modernist industrial architectural heritage.</p>