The renovation project aimed to restore the industrial building to its original splendour, highlighting its exposed brickwork both inside and out, large windows with geometric-patterned frames, and the double-pitched roof clad with interlocking clay tiles. In particular, the roof was completely dismantled to reveal the original iron trusses, which were left exposed on the interior. These trusses became the support for a new secondary timber framework, onto which Brianza Plastica’s Isotec ventilated thermal insulation system was installed. Thanks to its integrated stiffener, the Isotec panel enabled rapid and safe installation of the insulation while simultaneously creating a ventilation cavity between the insulation layer and the interlocking clay roof tiles. The ease of handling and workability of Isotec — even at height — made it possible to construct, in a single step, a load-bearing, thermally efficient deck that is both micro-ventilated and resistant to accidental water infiltration from the roof covering. The energy efficiency upgrade, achieved using Isotec rigid polyurethane foam panels (density 38 kg/m³), resulted in a thermal transmittance value (U) of 0.35 W/m²K, significantly improving the energy performance of the roof.