This code of practice provides guidelines for the thermal insulation of buildings to ensure energy efficiency and thermal comfort. It covers the selection of insulation materials, calculation of U-values, and condensation control methods for building envelopes.
Provides guidelines for selecting and applying thermal insulation materials in buildings to achieve desired thermal performance.
Quick Reference Values
Thermal conductivity (k) of EPS0.033 to 0.039 W/m·K
Thermal conductivity (k) of Glass Wool0.032 to 0.040 W/m·K
Standard interior surface film resistance (Rsi)0.13 m²·K/W (typical for walls)
Standard exterior surface film resistance (Rso)0.04 m²·K/W (typical for walls)
Key Formulas
U = 1 / Rt — Overall thermal transmittance
Rt = Rsi + R1 + R2 + ... + Rn + Rso — Total thermal resistance
R = d / k — Thermal resistance of a specific material layer
Practical Notes
Always ensure a continuous vapor barrier on the warm side of the insulation to prevent interstitial condensation.
Thermal bridging at structural joints (e.g., concrete columns breaking an insulated wall) significantly reduces the effective R-value of the assembly and must be accounted for.
Calculations from this code should be cross-referenced with the Energy Conservation Building Code (ECBC) for mandatory maximum U-values specific to your project's climate zone.