Intervention, Not Imposition
Our foundational philosophy is born from a forensic analysis of the building's original fabric. We begin every project by listening to the structure—understanding its history, its material weaknesses, and its inherent narrative. This is not a replacement process; it is a dialogue with the building's soul.
We employ the 'Invisible Repair' methodology: structural reinforcement techniques that leave no trace on the historical facade or interior character. This requires a dedicated network of quarries in the Paris Basin and artisans who practice traditional techniques passed down through generations.
"The goal is that a future historian cannot tell where the 19th century ends and our work begins." — Lead Architect, Ironexa
Specialized Divisions
A concise overview of our core capabilities, each with its own expertise and material focus.
Historic Residential Renovation
Full-scale restoration of Haussmannian apartments, focusing on period-accurate plasterwork, parquet, and decorative ironwork. We navigate Parisian preservation codes while modernizing internal systems.
Boutique Commercial
Adaptive reuse for modern offices, galleries, and retail. Balancing heritage integrity with contemporary functionality and acoustic requirements.
Structural Reinforcement
Non-invasive engineering for aging structures using carbon fiber and discreet steel frameworks.
- Seismic retrofitting
- Basement underpinning
- Load-bearing wall restoration
Material Craftsmanship
In-house workshops for custom joinery, stone carving, and metalwork. Every detail fabricated to exact specifications.
Project Management
Navigating Parisian permits, heritage regulations (ABF), and coordinating specialist trades within dense urban environments.
The Material Lexicon
From quarry to facade: a glossary of materials and the critical choices that define our craftsmanship.
Lutetian Limestone
The primary stone of Haussmann-era facades. Sourced from quarries near Oise, it softens and develops a patina over decades. We specify its use for load-bearing elements where its compressive strength (180-220 MPa) is critical.
Quarried: Saint-Leu-la-Forêt, France
The 7-Layer Lime Plaster
A micro-scenario of the application process for a breathable, crack-resistant finish. Each layer is applied with a specific aggregate mix and curing time, ensuring humidity regulation and structural flexibility. Cement-based modern mortars are a primary cause of historic wall spalling; our traditional lime alternative prevents this failure mode.
Oak for Structural Integrity
Selection criteria for beams include moisture content (<12%), grain orientation (quarter-sawn), and traditional mortise-and-tenon joints. The wood is air-dried for a minimum of 2 years to prevent warping in the Parisian climate.
The Client Journey
A clear, four-phase process from initial inquiry to long-term stewardship. No hidden stages, no ambiguous timelines.
Discovery & Feasibility
Weeks 1-3. On-site forensic survey, historical research, and initial concept sketches with regulatory pre-check. We deliver a feasibility report outlining constraints and opportunities.
Design & Specification
Weeks 4-10. Detailed architectural drawings, full material samples, and a fixed-price contract with transparent allowances. This phase locks in the project's visual and technical definition.
Craft & Construction
Months 3-12. Phased work schedule with weekly site meetings, progress photography, and a dedicated project manager as your single point of contact.
Handover & Aftercare
Final Month. Comprehensive walkthrough, a 12-month defect liability period, and a tailored maintenance guide for the restored elements to ensure longevity.
Decision Lens: Is Ironexa Right for Your Project?
We optimize for preservation integrity and long-term value. Use this criteria to see if our approach aligns with your priorities.
What We Optimize For
- Architectural authenticity and historical narrative
- Material longevity and low future maintenance
- Transparent, fixed-price budgeting
- Regulatory compliance and permit approval
What We Sacrifice
- Speed of execution (meticulous craft requires time)
- Ultra-modern design on a historic facade
- Lowest possible material costs
- Off-the-shelf, generic solutions
Trade-off Frame: Authenticity vs. Budget
Benefit: Using identical Lutetian limestone for facade repairs ensures perfect color/texture match and structural compatibility.
Cost: 30-40% higher than using a generic French limestone or synthetic stone panels.
Mitigation: We source from smaller, local quarries with direct relationships, reducing markup. The cost is itemized transparently in the Design & Specification phase.
Outcome: A repair that ages cohesively, maintaining the building's historic integrity and long-term asset value.
Ready to Discuss Your Project?
The first conversation is a no-obligation feasibility assessment. We'll listen to your vision and the building's story, then outline the possibilities and constraints.
Ironexa | 13 Rue de la Huchette, 75005 Paris, France
+33 1 43 54 79 52 | [email protected] | Mon-Fri: 9:00-18:00