Systemic pre-projectdiagnostic.

Before answering a competition or validating a feasibility, the project team seeks to verify several questions at once. Is the envisaged envelope technically realistic? What is its actual industrial cost, not the theoretical cost per square metre? What are the major risks that the upstream phase does not yet see? Which alternatives deliver more value at equivalent budget?

The diagnostic delivers the answers in parallel, on the same methodological base, not in disciplinary silos. Mobilisation timing is critical: too early, project hypotheses are too fragile to be tested; too late, the decision is already made and the diagnostic becomes an ex-post justification tool.

The project has entered schematic or detailed design and classic tensions surface: the cost consultant judges the project will not fit the budget, the architect refuses the proposed cuts, the owner no longer knows which reading to follow. The diagnostic provides an independent arbitration that unblocks the situation, not by choosing between camps, but by reframing the problem.

In the majority of cases, the budget/design gap rests on an implicit untested assumption: a system choice (stick vs unitised, SSG vs mechanically fixed), a rationalisable geometry, an underused supply chain, a thermal performance over-specified against actual regulatory requirements. The diagnostic identifies these tipping points.

A general or total contractor wants to respond to a mega-project with a complex envelope package. Its internal engineering team underestimates certain risks (jumbo glazing fabrication, unitised facade logistics, interfaces with structural and HVAC packages), bids received from facade subcontractors look inconsistent between themselves (30-50 % spread on comparable scopes), and the general contractor seeks an independent reading before committing its margin on the dossier.

The diagnostic documents the gap between declared risk and actual risk, and proposes a coherent costing grid for the general contractor, which can then renegotiate with its shortlisted subcontractors on an informed basis.

An investor (real estate fund, family office, institutional actor) evaluates the acquisition of a building. Existing envelope performance, probable renovation costs against regulatory horizons (decree tertiaire DEET in France, MoPEC and CECB+ in Switzerland, EPBD at EU level, MEES in the UK), carbon valuation potential (EU Taxonomy, SFDR, CSRD), exposure to stranded-asset risk over the operating horizon.

The diagnostic de-risks the acquisition decision with an industrial grid, not a commercial one. It typically produces a dossier usable at investment committee, with costed high/mid/low scenarios and a trigger horizon for compliance costs.

Decomposition of the project geometry (curvatures, grids, panels, critical nodes, structural interfaces). Identification of technically critical zones and of zones that can be rationalised without compromising architectural intent. Mapping of European supply chain capacity for each candidate system: unitised curtain wall (Schüco, Reynaers, Wicona, Technal capacity for large-format volumes), stick curtain wall, structural sealant glazed systems on long spans, jumbo glazing (18×3 m and above capabilities at European, American, and Asian glass processors). Production of costed constructive alternatives when the initial design exceeds the budget equation, with documented impact on visible geometry, performance, and carbon. The deliverable typically includes 2-4 alternatives, not a single forced recommendation.

Indicative thermal performance (global U-value, major thermal bridges to EN ISO 10211, b coefficient to SIA 380/1). Indicative acoustic performance (Rw to ISO 717-1, DnT,A,tr for facades on noisy streets). Structural coarse behaviour (wind loads to Eurocode 1 or SIA 261, admissible deflections to EN 13830 and SIA 329, indicative dimensioning). Condensation, weatherproofing and maintenance risks (Glaser diagnostic, WUFI analysis if hygrothermal complexity warrants). The level of analysis is calibrated for a diagnostic, it does not replace detailed calculations of a full engineering mission, but it sets the orders of magnitude and identifies zones where detailed calculations will be decisive.

Indicative carbon balance of the envelope (main materials: primary vs recycled aluminium, low-emissivity glass, mineral vs bio-sourced insulation), orders of magnitude, breakdown between production, transport and installation. Identification of optimisation potential: low-carbon sourcing (European hydro aluminium, cullet-based recycled glass), BIPV on productive orientations, bio-sourced materials, circular economy (reuse of components from deconstruction). Alignment with labels and frameworks targeted by the project: Minergie / Minergie-P / Minergie-P-ECO in Switzerland, LEED, BREEAM, WELL, DGNB, HQE, RE2020 in France, EU Taxonomy for projects financed by SFDR-bound funds. For projects at 2028-2035 horizon, integration of known regulatory trajectories (CSRD, EU Taxonomy thresholds, decree tertiaire, MoPEC 2025) to identify regulatory risk zones.

Industrial shadow pricing of the facade work package, built from actual fabrication, transport and installation costs as of the diagnostic date, not from per-square-metre averages. Comparison with the target budget: absolute gap, relative gap, analysis of critical line items. Costed reduction options, with documented impact on design and carbon. Budget risk assessment: probability of overrun, main variance drivers (aluminium market tension, fabricator capacity over the production window, maritime logistics). On complex projects, the gap between real industrial costing and a flat-rate estimate regularly reaches a factor of two, with a structurally unfavourable gap when costing relied on outdated per-m² averages.

Technical risks (geometry, interfaces, materials, new technologies). Industrial risks (fabricator capacity over the production window, aluminium and glass supply lead times, logistics, single-source dependency). Contractual risks (critical clauses, potential claims per the chosen framework: SIA 118/329, CCAG Travaux, FIDIC Red/Yellow Book, VOB/B). Carbon and regulatory risks (future compliance, stranded-asset risk at 2035-2045 horizon). The output is a risk heatmap, prioritised along two axes: probability of occurrence and financial or regulatory impact, and paired with documented mitigation measures.

Technical, economic and carbon roadmap, with prioritisation of actions in the next phase, warning points to monitor, internal and external competencies to mobilise (blast specialists, BIPV, acoustics, in-situ instrumentation). Recommendations are written to be actionable by the project team, not to justify the diagnostic's own conclusion.