The opaque vertical structures which delimit most buildings bear the greatest responsibility for thermal exchanges between the inside and the outside.
It is estimated that when restructuring, thermally insulating the external walls alone allows achieving energy savings of 20-25% in the case of single-family buildings, and of 30-35% for appartments.
In passive buildings and in those with a very low energy consumption (Nearly Zero Energy Buildings) the opaque outside walls are characterised by very low thermal transmittance values, ranging between 0,10 to 0,20 W/mK2.
These values can be obtained through various building methods and by placing the insulating layer:
The STIFERITE thermal insulation consists of polyiso foam, a particular type of rigid polyurethane foam developed by the STIFERITE laboratories
in order to best meet performance and operational market requirements.
The STIFERITE production range includes panels with different characteristics and types of coatings which have been developed to meet specific application needs. It is important to note that only panels specifically designated as suitable for external insulation systems must be used for ETICS applications (cappotto).
Limiting the thickness and the weight of the insulating material leads to significant construction savings and helps to reduce the environmental impact
of the intervention.
The figure compares the thickness necessary to obtain a Thermal Transmittance (U-Value) of 0,18 W/m2K for different insulating materials.
The thickness required to achieve this performance, using the most common insulating materials, is higher by a minimum of 25% to a maximum of 85% than that required by the STIFERITE insulating systems.
In addition to the excellent insulating performance, other characteristics of the STIFERITE polyurethanes are particularly important in exterior insulation systems: