Carbon strategy& envelopedecarbonisation.

§ 0120 to 30 % of embodied carbon

Facade and roof represent twenty to thirty percent of the embodied carbon of a tertiary building or a high-rise. This order of magnitude is structural: it makes the envelope one of the three or four major items of a full LCA (life cycle assessment).

§ 02Visible, measurable, auditable

These components are visible, measurable and auditable: they concentrate the attention of regulators and ESG investors. A less favourable CECB rating on a tertiary asset, a Minergie Eco P rating not reached, an EU Taxonomy classification out of alignment: each of these signals is read by investors and regulators through the facade first.

§ 03Substantial manoeuvre margins

Unlike the structure which remains strongly constrained by the shell, the envelope offers substantial manoeuvre margins on materiality, sourcing and design. The LCA of a facade can vary in substantial proportions depending on the choices made: two projects with equivalent thermal performance can display very different carbon balances. This manoeuvre margin is both a lever and a responsibility.

§ CHSwitzerland, MoPEC, SIA, CECB, Minergie

MoPEC (Cantonal Energy Prescription Models) imposes its 2014 and 2025 editions on new projects and deep retrofits. CECB and CECB Plus (Cantonal Building Energy Certificate) measure existing-asset performance and increasingly condition access to green financing. SIA 380/1 standard sets the thermal frame; SIA 2040 sets the pathway toward the 2000-watt society. Minergie, Minergie-P, Minergie-P-ECO labels and SNBS standard are the voluntary frames structuring high-end patrimonial valuation. The federal CO₂ law and the Programme Bâtiments complete the financial frame.

§ FRFrance, RE2020, décret tertiaire, BBCA

RE2020 replaces RT2012 for new construction, with thermal-performance, carbon-footprint and summer-comfort requirements that tighten in stages through 2031. Décret tertiaire (DEET) imposes energy-consumption-reduction trajectories of forty, fifty and sixty percent at 2030, 2040 and 2050 on the existing tertiary stock. OPERAT platform (ADEME) handles the declaration. BBCA label and HQE, E+C-, BBC Rénovation labels structure voluntary differentiation.

§ EUEurope, Taxonomy, SFDR, CSRD, EPBD

EU Taxonomy defines activities aligned with climate objectives: an eligible building becomes accessible to green financing at preferential rates. SFDR regulation (Sustainable Finance Disclosure Regulation) structures ESG communication of asset managers. CSRD directive extends transparency to non-financial companies. Recast EPBD directive sets European trajectories for building energy performance. DNSH frame (Do No Significant Harm) and Level(s) initiative complete the dispositive.

§ INTInternational, LEED, BREEAM, WELL, Living Building Challenge

Voluntary international certifications (LEED notably Platinum, BREEAM notably Outstanding, WELL, Living Building Challenge, EDGE) structure patrimonial differentiation on Anglo-Saxon, Middle-East and Asian markets. See Standards & Referentials for the cross-cutting frame.

§ 02Industrial grounding

Seventeen years in the envelope industry, including several years in pre-construction with a Tier-1 international contractor in glass envelope works, give the knowledge of real supplier capabilities, not only their commercial brochures. We know what is produced at scale, within what delay, at what cost.

§ 03Design integration

Carbon is a design parameter activated from sketch phase, not an external constraint applied afterwards. Real-time parametric LCA is the operational translation of this integration: it makes carbon a continuous arbitration criterion, not an a-posteriori measurement.

§ 04Technological neutrality

No commercial interest in a proprietary solution, no affiliation with a low-carbon glass manufacturer or a recycled-aluminium system supplier. Arbitration on the performance, cost and impact ratio, without commercial bias. See Technological neutrality.