Technical Portal for Sustainable Architecture
Life cycles exceeding 50 years and selective maintenance: the engineering of restoration in VM Group facades
Investment in the building envelope of an office, commercial, or residential building is evaluated based on its overall life cycle costing (LCC). An efficient cladding package must not only insulate, but also ensure that operating and extraordinary maintenance costs remain close to zero for decades.
With over 30 years of ventilated facade engineering, VM Group designs systems structured to exceed a 50-year service life. This is achieved through two key factors: complete protection from intergranular and atmospheric corrosion, and selective maintenance engineering.
Total modularity: the concept of Selective Maintenance
In traditional glued facades or thermal insulation composite systems (ETICS), a violent accidental impact (e.g., the movement of loads at height, vandalism at the base of the building) or a localized problem require invasive restoration work. Often, it is necessary to demolish large portions of the facade, with the real risk of failing to replicate the aesthetic and color continuity of the original cladding, as well as disrupting the thermal insulation.
The VM Group system is based on the principle of independent modularity:
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Mechanical decoupling: Each individual porcelain stoneware, stone, or HPL panel is installed as an independent element. There are no rigid contact constraints between adjacent panels.
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Timely replacement: In the event of damage to a single module, our construction site protocols allow for repairs to be carried out exclusively on the affected panel. By exploiting the technology of our fastening systems (whether with visible or concealed clips), the operator can quickly remove and replace individual panels, without interfering with the underlying insulation layer and without altering the structural stability of adjacent modules.
Materials engineering and galvanic corrosion prevention
The durability of a ventilated façade lies in the invisible details, namely within the cavity where air and humidity constantly flow. The metal substructure must withstand aggressive urban atmospheres, salt spray, or industrial climates laden with sulfur dioxide.
VM Group selects and processes metals according to strict electrochemical insulation criteria:
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Certified Aluminum Alloys: We use aluminum alloy extrusions that have undergone deep anodizing or Qualicoat Seaside-approved coating treatments, specifically designed to withstand marine environments.
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Prevention of Galvanic Corrosion: When different metals come into contact (e.g., aluminum for the substructure and stainless steel for the anchoring brackets or anchoring brackets), the presence of moisture can trigger a pile-up effect that corrodes the less noble metal. VM Group neutralizes this phenomenon by interposing insulating gaskets in plastic or EPDM material and using only stainless steel screws of the correct class (A2/A4), blocking any long-term structural degradation at the source.
Preservation of the thermal value of the insulation
Another critical factor determining a building's longevity is the health of the insulation panel. In traditional systems, water infiltration or interstitial condensation can soak the insulation. Damp insulation drastically reduces its thermal conductivity (lambda), reducing the building's energy efficiency and encouraging mold growth.
In VM Group's ventilated façade, the external cladding acts as an advanced weather shield (rainscreen effect). Over 90% of driving rainwater is drained from the exterior surface, while the minimum amount that manages to escape through the open joints is instantly evaporated by the continuous laminar airflow generated by the stack effect. The insulation remains permanently dry, maintaining its thermal and acoustic insulation properties throughout the entire life cycle of the structure.
