In exploring the design and construction of high-performance greenhouses, a detailed analysis of building materials is essential. What are the critical technical criteria for selecting materials for both the structural framework and the glazing components? Specifically, how do aspects such as thermal conductivity, UV stability, load-bearing capacity, and environmental durability influence the choice between materials like aluminum, galvanized steel, polycarbonate, and glass? Additionally, what innovations in composite materials or coatings have demonstrated measurable improvements in energy efficiency and longevity under variable climatic conditions? A discussion integrating laboratory data and field performance assessments would be greatly beneficial.