translate English to French: If the five layers available are not sufficient, it is advised to add the thicknesses of the same or similar layers for insulation performances.The heat conductivity values of materials not produced by Stiferite were obtained from standards or from technical literature.This calculator offers only a rapid indication of the transmittance value of the individual structures and does not intend to substitute the more thorough assessments of the normal programmes for calculating the total heat transmittance of buildings.
si les cinq couches disponibles ne devaient pas suffire, nous conseillons d’ajouter les épaisseurs de couches égales ou semblables pour des prestations isolants.