Some envelope projects demand a specialist facade engineering practice that sits well beyond the standard scope of a general engineering office, because they touch extreme resilience, active skins, envelope mechatronics, structural glass at the limits, high-performance materials, energy-generating facades, the systemic reading of an existing building asset, forensic investigation, or Swiss regulatory compliance. These situations cannot be handled opportunistically. They demand vertical practices sustained continuously. This page gathers the twelve SOTA specialties our atelier-laboratory carries inside the Envelope Engineering pole, organised across six cohesive families. Each one is mobilised as a vertical when a project requires it, never pushed by default. All of them are maintained by our applied research practice: test protocols, detail libraries, normative monitoring, dedicated industrial partnerships.
FIG. 00 · Expertises hubThe twelve specialties our atelier maintains in continuous practice organise across six families. The shared challenge is to avoid the trap of imported specialty that does not integrate with the other lots.
FIG. 01 · CapabilitiesResilience and security: blast-resistant glazing (bomb blast), anti-intrusion RC4 to RC6, impact. Active skin and mechatronics: smart skin / electrochromic glass, complex motorised envelope systems (revolving doors, kinetic facades, motorised solar shading, BMS-driven ventilation openings). Materials and structures: structural glass and jumbo glazing, high-performance envelope materials (timber cladding, weathering steel, UHPC, GFRP, terracotta, ceramic, ETFE/PTFE textile structures). Energy and carbon: BIPV (energy-generating envelope), circular economy, urban mining. Diagnostics and forensics: reading an existing envelope asset as a system, judicial expert witness and facade pathology. Regulatory compliance: MoPEC, CECB, Minergie, SIA Swiss normative frameworks for energy compliance of the envelope. The role of the Envelope Engineering pole is to carry that integration. SOTA expertises are not silos: they enrich the systemic mastery we bring on a project, they do not replace it.
| Attribut | Specialty | Typical clients | Main project phase |
|---|---|---|---|
| Blast & resilience | Owner, architect, GC | Design → execution | |
| Anti-intrusion RC4-RC6 | Owner (heritage, diplomatic, UHNWI) | Design → execution | |
| Smart skin / electrochromic | Owner, architect | Design → commissioning | |
| Complex motorised envelope systems | Architect, owner, facade contractor | Design → commissioning | |
| Structural glass & jumbo glazing | Architect, facade contractor | Design → fabrication | |
| High-performance envelope materials | Architect, owner, facade contractor | Design → fabrication | |
| Membranes & textile structures | Architect, GC | Design → execution | |
| BIPV, energy-generating envelope | Owner, investor | Design → operations | |
| Circular economy & urban mining | Owner, investor, GC | Diagnostic → design | |
| Systemic diagnostic | Owner, investor | Pre-decision → pre-design | |
| Forensic expertise & facade pathology | Owner, insurer, lawyer, expert witness | Loss event → contradictory | |
| Compliance MoPEC/CECB/Minergie/SIA | Owner, investor, asset manager | Audit → compliance |
Project typology guides the mobilisation. A few typical configurations: signature tertiary tower in Switzerland or Europe: structural glass, BIPV for energy performance, smart skin on selected oriented facades, systemic diagnostic on the global performance. UHNWI or diplomatic headquarters: blast-resistant glazing and anti-intrusion RC4-RC6 as a layer integrated into the architectural design, without aesthetic compromise. Museum, cultural institution, embassy: structural glass for the architectural signature, anti-intrusion per programme, smart skin for daylight modulation, structural membranes for atria. Full retrofit of a tertiary asset: systemic diagnostic upstream, BIPV as a renovated layer, circular economy for the disassembly and reuse of recoverable components. International mega-project: multi-vertical orchestration via our Design-Build Lead, with simultaneous mobilisation of several specialties per programme.
Projects exposed to extreme resilience risks (sensitive corporate headquarters, embassies, institutions, UHNWI heritage assets, strategic public buildings) demand an envelope engineering conceived from the sketch phase, not added as a late layer. Two specialties dominate this territory.
Sizing of the envelope (glazing, assemblies, anchorages, secondary structure) under explosion loading.
Applicable references: UFC 4-010-01 (US Department of Defense, widely adopted in diplomatic and Gulf), NFPA 285, EN standards for Europe, SAFE protocols for the United Kingdom. The design integrates multi-ply laminated glass, effort-retention assemblies, ductile anchorages, and post-fracture behaviour modelling.
Sizing under sustained forced-entry attempts per EN 1627.
Classes RC4 (10 minutes with electric tools), RC5 and RC6 (professional saws and grinders). High-security laminated glass (P6B to P8B per EN 356), reinforced profiles, anti-pull-out anchorages, integration with detection systems.
These two specialties often combine on the same project. The atelier's challenge is to integrate them into the architectural signature: resilience requirements must not degrade the designer's intent, they must dissolve into the geometry and materiality.
When the envelope ceases to be a static object and becomes a dynamic component of the building, two territories coexist: optical modulation (active glazing) and mechatronics (complex motorised envelope systems). Both share the same discipline: BMS integration and operational piloting.
Active glazing and embedded sensors: electrochromic (SageGlass, View, Halio, Merck), PDLC (switching transparent/opaque), embedded sensors (temperature, humidity, differential pressure, indoor air quality, tightness incidents). The envelope becomes a measurement organ feeding the BMS for active heritage operations. Envelope mechatronics: signature revolving doors, secured diplomatic vestibules, kinetic institutional facades, motorised solar shading, skylights and ventilation openings driven by BMS. References EN 16005, EN 12453, Machinery Directive 2006/42/EC. Piloting via BACnet/KNX/Modbus, BMS/SCADA integration, remote monitoring.
Dynamic facade with BMS piloting, BACnet/KNX integration.
The smart skin business case is built carefully: the CAPEX uplift on the glazed layer is real, but it arbitrates against OPEX savings, occupant comfort, heritage value at resale or lease, and certification compliance (LEED, WELL, Minergie-Eco).
Revolving doors, kinetic facades, secured vestibules, motorised solar shading, BMS-driven ventilation openings.
Envelope mechatronics engineering: industrial partner selection (Boon Edam, Record, Geze, Dorma, Warema, Colt, Hueppe), shaft and motor sizing, BMS/BACnet/KNX/Modbus integration, EN 16005 / EN 12453 / Machinery Directive compliance, contractual maintenance plan.
When architecture demands transparencies without visible frames, glazed units beyond European standard sizes, or a palette of high-performance envelope materials (timber cladding, weathering steel, UHPC, GFRP, terracotta, ceramic, ETFE/PTFE textile structures), engineering must hold under particular conditions, often at the edge of what the industrial sector can produce today.
FIG. 04 · SkylightSSG (structural silicone glazing) without visible frame and jumbo formats beyond the European 6 × 3.21 m standard, up to 18 × 3.3 m at certain processors.
Structural silicone joint sized per ETAG 002 / EAD 090010-00-0404, ageing modelled, factory QA. Jumbo sizing integrates transport, handling, installation, and the processing limits (tempering, lamination, bending) available in Europe.
CLT timber cladding, weathering steel, aluminium, stainless, composite panels, UHPC, GFRP, terracotta, ceramic, ETFE/PTFE textile structures.
Three roles held bay by bay: structural (UHPC, load-bearing weathering steel), cladding (timber, terracotta, ceramic, composite), infill (glazing, structural ETFE). The fiche also covers ETFE/PTFE membranes as long-span transparent infill for atria, stadia and cultural infrastructures.
ETFE film and PTFE coated fabric membranes are covered in the high-performance envelope materials fiche, as a sub-register of long-span transparent infill for atria, stadia and cultural infrastructures.
The envelope is gradually becoming an energy lever and a carbon lever, not a cost centre to neutralise. Two specialties structure this territory.
Building-integrated photovoltaics turn envelope surfaces into energy-producing organs.
The engineering covers thermal sizing (modules heat up and degrade yield), architectural integration (custom modules, finishes, monochromy, visual restraint), electrical interfaces (inverters, storage, BMS connection) and the business case. The latter is central: CAPEX uplift arbitrated against annual production, guarantees of origin, OPEX savings on self-consumed electricity, and ESG asset valuation.
The envelope is designed to be disassembled, sorted and reused, not merely recycled at end of life.
Design for disassembly (DfD) principles impose mechanical rather than bonded assemblies, standardised components to facilitate redistribution, and material passports documenting composition and traceability. Urban mining complements the approach with systematic valuation of removed elements (facades, joinery, glazing) on retrofit and deconstruction projects. The practice meets the requirements of certifications (BREEAM, LEED Platinum, Cradle to Cradle) and translates favourably into asset valuation.
Both specialties articulate with the carbon strategy carried by the Envelope Engineering pole across all our projects.
Reading an existing envelope as a system is the upstream side. Investigating a loss event or a contradictory facade dispute is the downstream side. Two twin specialties, same measurement and reading tools, different contractual finalities. Targets: institutional owner or investor in pre-decision, insurers and lawyers in litigation phase.
Systemic diagnostic covers: measured thermal performance and air-tightness (infrared thermography, air-tightness test, in-situ U-value spot readings); active pathologies (infiltrations, condensations, debonding, anchorage defects, corrosion); current and forthcoming regulatory compliance (MoPEC, CECB, French décret tertiaire, EU taxonomy); valuation potential; contractual reading. Auditable deliverable usable by third parties (acquirers, insurers, certifiers, banks). Forensic expertise and facade pathology covers: forensic analysis of loss events and disorders, judicial expert witness assignments, dires in contradictory, amicable and insurance expertises, support to construction-law specialised lawyers. Methodology shared with the systemic diagnostic, contentious finality.
Reading an existing envelope asset as a coherent system, not as a list of defects.
Frequent entry door to Owner's Engineer or Lead Envelope Consultant. Six dimensions in parallel: geometry, physics, carbon, economics, risks, recommendations. The deliverable is a structured and auditable report, usable by third parties (potential acquirers, insurers, certifiers, banks). It allows the owner to decide on a factual basis (preservation, phased retrofit, full retrofit, even divestment) rather than on contradictory estimates from stakeholders.
Forensic, contradictory, dires, judicial expert witness, amicable and insurance expertises.
Mission often activated downstream of a loss event, a disorder or a technical dispute. Forensic method shared with the systemic diagnostic: in-situ measurements, contractual reading, pathological analysis, auditable restitution. Contentious finality: support to construction-law specialised lawyers, dires in contradictory before tribunal, inter-party amicable expertise, dommages-ouvrage insurance expertises.
Swiss normative frameworks (MoPEC, CECB, Minergie, SIA) now structure the energy compliance of any envelope project in Switzerland, new build or retrofit. Compliance is not a by-product of the diagnostic: it is a distinct discipline activated at investor pre-decision, in pre-construction, and in active heritage operations.
MoPEC, CECB, Minergie, SIA, Swiss normative frameworks for energy compliance of the envelope.
Cantonal MoPEC audit (Vaud, Geneva, Bern, Zurich, Ticino, ...), CECB and CECB Plus issuance, Minergie / Minergie-P / Minergie-Eco / Minergie-A certification, compliance with SIA 380/1, 380/4, 382/1, 416, 451 standards according to the programme. The mission covers the initial audit, the compliance roadmap, the piloting of the necessary envelope transformations, and the third-party-auditable dossier (cantonal authorities, banks, certifiers).
SOTA specialties are not purchased à la carte. They are technical verticals that our atelier mobilises in service of a mandate carried by the Envelope Engineering pole.
The SOTA specialty is integrated into the owner's arbitration on a specific decision.
Choice of electrochromic vs static solar, applicable RC level, BIPV vs separate roof PV. Short mandate, targeted deliverable.
The SOTA specialty becomes a detailed design layer carried in the global technical coordination.
Articulated with structure, thermal performance, watertightness, acoustics and the project's carbon strategy.
The SOTA specialty structures the industrial strategy of the grouping.
Choice of specialist partners (BIPV fabricators, jumbo processors, electrochromic suppliers), contractual negotiation, execution piloting.
The choice of mode depends on the mandate's scope, not on the specialty. A single specialty can be mobilised under an Owner's Engineer on one project and under a Lead Envelope Consultant on another. What remains constant is the methodological rigour and the trusted-third-party posture.
The vertical expertises maintained in continuous practice by the atelier, and their articulation with the rest of the practice. Twelve published fiches covering the full SOTA register, plus five gateways to articulate with neighbouring poles.
Reading an existing envelope as a system, frequent gateway to Owner's Engineer or Lead Envelope Consultant.
Blast and ballistic design on risk-profile projects, ISO 16933/16934, UFC 4-010-01, GSA.
Forced-entry resistance per EN 1627, classes RC4 to RC6, WK4-WK6.
Dynamic facade with BMS control, BACnet/KNX integration.
Revolving doors, kinetic facades, secured vestibules, motorised solar shading, BMS-driven ventilation openings.
Large-format glazing, DIN 18008, EN 16612, up to 3.2 × 18 m.
CLT timber cladding, weathering steel, UHPC, GFRP, terracotta, ceramic, ETFE/PTFE textile structures.
Free-form ETFE/PTFE/PVC, stadia, atria, canopies.
Building-integrated photovoltaics, EU Taxonomy and RE2020 alignment.
Design for disassembly, EPD, ISO 20887, Cradle to Cradle.
Forensic, contradictory, dires, judicial expert witness.
MoPEC, CECB, Minergie, SIA, Swiss normative frameworks for energy compliance of the envelope.
Envelope Engineering pole: project discipline that carries the SOTA expertises in systemic integration, never in silos. Business Engineering pole: advisory to facade contractors whose activation of SOTA expertises is part of moving up-market. Solutions for Owners & Investors: frequent context for SOTA mobilisation on heritage assets or signature projects. Solutions for Architects: frequent context for technical specialty mobilisation to sign an architectural intent. Lead Envelope Consultant: frequent contractual mode to integrate several SOTA expertises during design.