Abstract This paper investigates the critical role of cell morphology, specifically fine-cell structures (mean diameter < 0.1 mm), in determining the Long-term Thermal Resistance (LTTR) of Extruded Polystyrene (XPS) foams. By analyzing gas diffusion mechanisms and the aging process over a 20-year...

  Calculation Assumptions All U-Value calculations are performed in accordance with BS EN ISO 6946:2007. The thermal conductivity (λ) of the internal masonry block is assumed to be 1.13 W/m·K. Internal finishes consist of 12.5 mm standard plasterboard with a 3 mm plaster skim coat applied to the bonding...

  I. Construction Method Statement: Aerogel Systems (Thin-Plaster & Integrated) In exterior wall applications, Aerogel blankets are typically integrated as high-performance core materials within a system rather than being exposed. Substrate Preparation Flatness Control: The substrate deviation must...