Currently, waste management and energy consumption are two of the major concerns of humankind. In Europe are produced around 355 million tyres per year and buildings account for 40% of the total primary energy consumption, being most of it for space heating and cooling.

Over the last years, LSF system has proliferated worldwide. In Portugal, the economic panorama triggered the need for innovative construction processes. LSF system emerged as a new trend that could be implemented indoors and exported, representing a major economic opportunity for national industry. Moreover, LSF system is very suitable also to buildings refurbishment, being this one of the main current strands in the construction sector. LSF system outstrips tradition construction in such fields as pre-fabrication, construction process (e.g. dry construction), building quality and sustainability. As an industrialized system, LSF buildings benefit from superior quality achieved by factory high quality control.

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To fulfill the Energy Performance of Buildings Directive (EPDB) goals, effective strategies must be carried out to minimize energy consumption of buildings. Although its advantages, in LSF buildings is also important to mitigate thermal bridges, being one of the strategies to assemble an insulating material, in a strip form, between the steel studs and the sheathing materials. The bibliography did not reveal any solution combining recycled tyre rubber and aerogel for this purpose.

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Among the many waste materials produced worldwide waste tyres are a major concern. Nowadays, processes to obtain recycled rubber granulate have already been developed, being this product currently integrated in civil engineering applications. The further integration can contribute to solving four environmental problems: energy consumption, noise, pollution and waste management.