U‐Values and Traditional Buildings In Situ Measurements

Introduction

Historic Scotland commissioned this study to investigate the suitability of current U‐value calculation software for assessing traditional buildings. The study spans from 2007 to 2010 and aims to inform energy performance assessments and improvements for such buildings. It highlights the importance of accurate thermal performance data in balancing conservation needs with energy efficiency goals.

Context and Issues

U‐Values and Thermal Performance

U‐values quantify the rate of heat transfer through building elements per square meter per degree Celsius temperature difference between the interior and exterior. Traditionally calculated with modern construction in mind, U‐values are critical for understanding energy performance but may not accurately reflect the thermal behavior of older, permeable building materials.

Measurement Methodology