Expert guides on U-values, thermal bridging, UK Building Regulations, and condensation risk — written for architects, surveyors, and energy assessors.
A clear explanation of U-values for architects, surveyors, and energy assessors — what they measure, how they relate to R-values, and why the number matters for UK Building Regulations.
Step-by-step guide to calculating U-values by hand using BS EN ISO 6946 and BR 443. Worked examples for solid walls, cavity walls, and timber-frame constructions with thermal bridging.
Thermal bridging is where modern insulated buildings quietly lose heat. Psi values, y-values, accredited construction details, and how to handle them under SAP 2021 and Part L 2021.
Current U-value limits and targets across England (Part L 2021), Scotland (Section 6), Wales (Part L), and Northern Ireland (Technical Booklet F). New build, extension, and renovation requirements explained.
Why modern insulated buildings can still get condensation, mould, and rot. Interstitial condensation, dew point, vapour control, BS 5250, and how the Glaser method works under ISO 13788.