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Thermal transmittance U-value (W/(m²K)

Calculation of the thermal transmittance is based on the numeric method according to EN ISO 10211 and EN ISO 10077-2.

  • heat transmission resistance at the inner surface Rsi = 0.13 m2K/W
  • heat transmission resistance at the outer surface Rse = 0.04 m2K/W
  1.  The installation of insulation in the LIGNATUR element is not recommended. If insulation is required in the element due to the limited space, a special certificate from a specialist is required.