Removable and demountable partition walls for offices

The French commercial property stock amounts to roughly 1 billion m2 and 38% of employees work remotely at least one day a week. The result: demand for partitioned meeting rooms, pods and phone booths is soaring at the expense of fixed workstations. Three sets of rules govern your removable partitions in commercial offices.

These acoustic thresholds are a floor, not a target. In practice, a well-sealed Rw 38 outperforms a poorly installed catalogue Rw 52: the execution quality of plenum junctions takes precedence over the performance stated in the laboratory. Demountable partitions, reusable across several reconfiguration cycles, fit into a circular economy logic. BREEAM certifications and the complementary NF Habitat profiles reward these solutions through credits dedicated to spatial flexibility.

Selling any non-masonry partition as « removable » is a commercial misuse: only a minority of partitions labelled « removable » are actually moved during their service life. The correct word is almost always « demountable », sometimes « modular », rarely « removable » in the strict sense.

In our recent closed-office projects, the demountable modular solution is predominantly chosen, combining flexibility and acoustic performance up to Rw 52 dB. Finishes cover laminated glass, melamine, laminate and stretched acoustic fabric, with EPDs available for your environmental justifications and commercial certifications.

Choosing a removable partition is not an interchangeable fit-out item. It is an architectural trade-off that commits the reading of your floor plate over 10 to 15 years. Three questions structure the program on the project management side.

• Dimensional tolerance of the existing floor plate. The applicable DTU requires 3 mm over 2 m, but on 1970-1990 buildings, a significant fraction of floor plates exceeds 8 mm of residual deflection. Your modular partition must then incorporate levelling jacks: an additional cost of 8 to 12% of the package.
• Acoustic continuity at plenum and raised floor. The catalogue Rw is measured in the laboratory, without a through-plenum. In real conditions, the absence of an acoustic return in the plenum drops performance by 5 to 10 dB. This gap is the designer’s responsibility, not the supplier’s.
• Layout consistency with the facade grid. Modules of 90, 100 or 120 cm. On the 1.35 m spandrel grid common in Haussmann-era commercial retrofits, no standard pitch lands exactly: adjustment modules must be planned at the end of each run.

The relevant economic criterion is not the price per linear meter but the cost per reconfiguration over the life cycle. At 4 reconfigurations over 10 years, the demountable partition costs a fraction of a plasterboard demolition-reconstruction, whose worksite mobilises labour, rubble removal and a complete repainting. Below 2 reconfigurations, the trade-off reverses: let’s talk about it before you commit the budget.

Commercial honesty requires naming the cases where we will steer you towards another solution. Three configurations make the removable partition unsuitable.

• Fewer than 2 reconfigurations planned over 10 years. The initial extra cost of 15 to 30% never pays for itself. A traditional plasterboard partition, more acoustically efficient at the same budget, remains the rational choice.
• Floor plates of less than 200 m2 with stable use (medical practice, notary’s office, local agency). The reversibility promise remains theoretical: your budget is better invested in reinforced acoustic insulation and premium finishes.
• Buildings with very high structural irregularity (deflection greater than 15 mm, undocumented old technical floors). The cost of levelling jacks and junction adjustments then exceeds the flexibility benefit.

In these three cases, Kytom tells you during the audit phase, before the costing. Our 11 agencies in France and Spain support hundreds of commercial clients each year: our commercial interest is your satisfaction over 10 years, not the sale of an unsuitable package.

1. 3D scanner audit of the existing floor plate
   We scan your entire floor plate in 5 working days, with flatness checks to DTU tolerance (3 mm over 2 m). The deliverable includes the point cloud, the identification of structural defects and the diagnosis of plenum and raised-floor constraints. This phase conditions everything that follows: a botched audit generates 8 to 12% in extra cost from levelling jacks during installation.
2. BIM design and module layout
   In 3 weeks, our engineering office models your partitions in BIM, finalises the modular 90/100/120 cm layout, selects the acoustic performances Rw 35, 44 or 52 dB according to the use of each room and validates the finishes (laminated glass, melamine, laminate, stretched acoustic fabric). You receive a navigable model and a dimensioned execution plan.
3. Detailed costing and model validation
   The costing breaks down package by package: panels, glazing, hardware, doors, junctions, installation, acceptance. You validate the solution on a physical model presented in one of our 11 agencies in France or Spain. No manufacturing commitment is made before this validation, which secures your final trade-off on the visible finishes.
4. Traceable industrial manufacturing
   4 to 6 weeks of manufacturing in our partner workshops, with full material traceability and EPDs available for your environmental justifications as part of certification processes. The modules are packaged by installation zone to limit on-site handling and accelerate deployment.
5. Coordinated installation and acceptance in 3 phases
   Installation is coordinated at a sustained pace per installer, planned to meet the worksite milestones. Acceptance takes place in three stages: technical inspection with in-situ acoustic measurement, aesthetic inspection of alignments and finishes, then clearing of reservations within 15 days. Your floor plate is delivered compliant with the reference acoustic requirements and the DTU, ready to occupy.