How can existing building stock be systematically upgraded to meet modern energy efficiency standards while maintaining operational functionality? Paul Appleby provides a comprehensive framework for integrating sustainable practices into the lifecycle of aging infrastructure. The text synthesizes technical engineering principles with management strategies to address the carbon footprint of the built environment. By examining the intersection of retrofitting technology and daily facility maintenance, the author argues for a holistic approach to long-term building performance.

Reader & Expert Consensus: Professionals in the field of facilities management and sustainable architecture frequently cite this work as a practical reference for technical implementation. Experts highlight the text for its clear articulation of the challenges inherent in upgrading older structures to meet contemporary environmental mandates.