An uninsulated brick wall Thickness Conductivity Resistance
  mm W m-1 K-1 m2 K W-1
Layer 1 Outside thermal resistance   0.04
Layer 2 Single brick 115 0.77 0.15
Layer 3      0.00
Layer 4 Single brick 115 0.77 0.15
Layer 5 Dense plaster 13 0.57 0.02
Layer 6 Inside thermal resistance   0.13
  Total resistance 0.49
U-value (W m-2 K-1) 2.03