The lambda value describes the thermal conductivity of a building material and is one of the most important values for assessing its suitability for building and renovation. In times of massively rising energy costs and against the background of the scarcity of fossil fuels, the thermal insulation properties of the building envelope play a decisive role. Our well-known MONTANATHERM® sandwich elements for roofs and walls combine load-bearing capacity, room closure, weather and fire protection as well as thermal insulation in one component:
The excellent thermal insulation properties result from the core layer with polyurethane (PIR) rigid foam, which is manufactured in an environmentally friendly way using CFC- and HCFC-free blowing agents. Through continuous process optimisation and ongoing quality monitoring, the thermal insulation performance of the sandwich panels has been further improved.
Taking ageing effects into account, the panels now have a low lambda value of 0.021 W/mK, which is officially and independently confirmed by the inspection body of the SIA 279 commission. In combination with a 180 mm thick sandwich façade element, this results in a heat transfer coefficient U of 0.12 [W/m2K], for example, which achieves efficient thermal insulation in summer and winter and will put a smile on your face the next time you have to pay your energy bills.