The regs: School buildings

Thermal conductivities of insulation materials

Thermal conductivities of insulation materials 
ProductThermal conductivity (W/mK)
Synthetic materials
Mineral fibre0.032-0.044
Glass fibre0.038-0.041
Extruded polystyrene0.033-0.035
Expanded polystyrene0.037-0.038
Natural materials
Wood fibre0.038-0.050
Cellulose0.035-0.040
Hemp0.038-0.040
Wool0.038-0.040
Flax0.038-0.040