Bridging is not only an engineering work that allows people to be brought into contact, but it turns out to be the most correct way to define the junction between two non-adjacent nodes. The definition of the word thermal bridge results a connection between two construction elements, which promote a passage of thermal transmission, heat loss.

Thermal bridging is understood as the part of the envelope that shows changes in thermal resistance due to materials with high thermal conductivity and geometric variations, such as occurs in the joints between walls, floors, ceilings ,windows, through-terrace slabs, window connections, pillars , beams and curbs.

Thermal bridges cause changes of up to 30% in the total result, in buildings with a high thickness of thermal insulation. This occurs because thermal bridging can increase the thermal transmittance value of a wall by up to 35%.

In addition, thermal bridges are responsible for some diseases that can appear in buildings, such as the appearance of condensation, mold and mildew, due to the reduction of indoor surface temperature.

The best of the solutions for correcting thermal bridges and use 'low thickness thermal insulation Nobilium Thermalpanel which reduces the thermal transmission of thermal bridging, having a declared lambda of 0.032 W/mK a mass of 180Kg/mc and an and specific heat 2100 J/KgK. Adding these principles together then we can say that 9 mm of the 'Nobilium Thermalpanel low-thickness thermal insulation placed side by side with a 30 cm concrete wall leads to a reduction in thermal transmittance of -48.4% and increases the thermal resistance of the masonry by +93.8% with a phase shift of 9.79 h.

In Italy, the Court of Cassation, in Order No. 22093/2019, has included defects on the thermal coat among the "serious flaws and defects of the work" . The order states that not only those related to the stability of the building can be considered serious defects, instead, all defects that seriously affect the normal enjoyment of the building, its functionality and habitability are also to be considered serious. In this specific case, a poorly executed thermal coat results in a 50 percent reduction in thermal resistance, with consequences both in terms of consumption and living comfort.

It is important to point out that current energy legislation does not exclude "incorrect" thermal bridges in a building and allows the prescribed transmittance values to be obtained by averaging the value of the current portion of the wall with the fictitious portion (at the thermal bridge) but, as provided in Annex E of Legislative Decree 192/05, requires the designer-in the report-to take measures and make calculations for the attenuation of thermal bridges in order to avoid the formation of surface condensation

In Switzerland, the consideration of thermal bridges is mandatorily required by the cantonal standards and guidelines on thermal insulation for conversions and changes of use, SIA 380/1, para. 2.2.3.6, requires that thermal bridges of building elements affected by the conversion be rehabilitated as far as possible. However, there are no specific binding values for such remediation.

If, for reasons of building physics or the need to protect historical or artistic heritage, it is not possible to meet the requirements for individual building elements, it will be necessary to demonstrate that, as in the case of the improvement of elements not involved in the transformation, the overall transformation requirement is met. Only on this basis will the competent authority be able to grant exemptions if necessary.

The bilateral agreement assumes that Switzerland and the EU have equivalent standards for making construction products available on the market.

Specifically, Nobilium Thermalpane low thickness thermal insulation board falls under the harmonized standard EN 13162 . The latest available list was published in the Commission Communication in the framework of the implementation of Regulation (EU) No 305/2011 of the European Parliament and of the Council laying down harmonized conditions for the marketing of construction products and repealing Council Directive 89/106/EEC3 (Information No. 2016/C 398/09).