Office curtains: visual comfort, acoustics and ERP standards

8-min read — Updated November 2025

In an office open-space, the curtain is never chosen for aesthetics alone. It must answer three simultaneous requirements: fight solar glare (visual comfort on screens), attenuate acoustic reverberation (concentration and productivity), and comply with ERP regulation applicable to offices (fire safety). Three criteria that office managers often handle separately — when they should be integrated upstream.

This article provides CFOs, office managers, HR directors and tertiary interior architects with the 2026 technical framework to choose and specify office curtains that perform on these three axes, with realistic budgets.

1. Regulatory context: are offices ERP?

The answer depends on the configuration:

• Private office building (employees only): classified as ERT (Workers-Receiving Establishment). Labour Code rules apply, not the ERP regulation strictly. More flexible fire requirements but nevertheless present.
• Offices receiving the public (customer reception, commercial agencies, consulting firms with frequent reception): classified ERP type W. ERP rules apply, M1 fire rating required on hung textiles.
• Mixed building (offices + ground-floor shops): differentiated ERP zones, rules to apply per zone.

Labour Code requirements for non-ERP offices

Article R4227-28 and following: decoration materials must limit fire spread. Case law considers that curtains rated M2 minimum satisfy this obligation in a standard ERT. However, in practice, most real-estate managers and insurers require M1 as a precaution.

Special case — IGH (High-Rise Buildings)

In office towers classified IGH (> 28 m highest floor height), reinforced requirements: M0 or M1 mandatory, with up-to-date test report and centralised safety file. Any textile modification must be notified to the building's safety service.

2. Visual comfort: fighting glare and eye fatigue

Sunlight glare on a screen generates measurable eye fatigue: less frequent blinking, dry eye, headaches. Studies show that 60-80% of employees in glazed spaces report regular discomfort. Textile is the main correction lever.

The 4 technical solutions according to exposure

Solution 1 — Window-by-window roller "screen" blind

Micro-perforated technical fabric (3-10% openness) in PVC on glass fibre, or woven Trevira CS. Filters 80-95% of UV radiation and 70-85% of glare, while preserving the outside view.

Budget: €90-180 excl. VAT/m² installed. Motorisation recommended for bay windows > 3 m.

Solution 2 — Double blackout curtain + filtering sheer

Opaque curtain mobilised only under strong sun or video projection (meeting room), combined with a permanent sheer filtering 60-75% of glare.

Budget: €180-320 excl. VAT/m² for the complete system. Warmer aesthetic than a screen blind, suited to executive spaces, board rooms, VIP receptions.

Solution 3 — Vertical-blind strips

Classic tertiary solution, now visually dated. Manual band reorientation according to solar angle. Economical budget but "old bank" image.

Budget: €50-110 excl. VAT/m². Little recommended in 2026 image renovation except strong budget constraint.

Solution 4 — Aluminium or wood Venetian blind

Tiltable horizontal slats. Effective on solar control, but acoustically neutral (no absorption) and more complex to maintain than a textile.

Budget: €80-160 excl. VAT/m² aluminium, €140-280 excl. VAT/m² wood. "Industrial design" niche or classic premium offices.

3. Open-space acoustics: a topic that has become a priority

Since open-spaces became widespread in the 2000s, employees' #1 complaint in offices is ambient noise. Phones, conversations, printers, air-conditioning — without treatment, the sound level rises to 55-65 dB(A), the threshold beyond which concentration becomes impossible for cognitive tasks.

Target reverberation time in offices

The NF S 31-080 standard (offices) recommends:

• Open-space: RT < 0.5 s (ideally 0.35-0.45 s)
• Meeting rooms: RT < 0.6 s
• Closed individual offices: RT < 0.7 s
• Reception halls: RT < 0.8 s

Acoustic contribution of a curtain in offices

A standard office curtain (200-280 g/m², French or flat pleating, 8-15 cm from the glazing) provides an αw of 0.30 to 0.50. By covering 15-25% of a glazed façade, one typically gains 0.05 to 0.12 s on the open-space RT — useful but insufficient alone.

For a complete open-space treatment: combine façade curtain + textile acoustic wall panels (αw = 0.85) + absorbing ceiling + carpet. The synergy of the 4 levers takes an open-space from 0.9 s to 0.45 s RT.

4. Recommended materials in offices

Trevira CS polyester — the 2026 office standard

Polyester fibre fireproofed in the mass, 180-320 g/m². Permanent M1, excellent UV resistance, simple care (40° washing possible, sometimes 60°), 10-15 year lifespan. Represents 70% of high-end office textiles installed in France.

Fabric budget: €18 to €40/lm depending on fineness and design. Reference brands: Création Baumann, Kvadrat (certain ranges), Delius, Décortex.

FR recycled polyester

Strong trend since 2023 in projects with CSR objectives. Technical performance equivalent to Trevira CS, carbon footprint −40 to −60%, same M1 fire rating. Slightly higher budget (+10-15%).

FR cotton-linen weaves (in-mass fire-retardant treated)

Natural touch, warmer aesthetic than polyester. Beware of fire ratings: validate only after checking the in-mass M1 test report. Budget €30-60/lm, 8-12 year lifespan.

To avoid in offices

• Heavy velvet: acoustically performant but captures dust in open-space, complex maintenance.
• Shiny synthetic sheers (organza): dated image, zero acoustic absorption.
• 100% untreated cotton: non-compliant with ERP, light-sensitive (quick yellowing).

5. Use cases by office typology

Open-space 40-200 desks

Motorised screen blind on the outside face (solar treatment) + acoustic wall panels every 4-6 m (reverberation treatment). Textile budget: €35-65 excl. VAT/m² floor area.

Meeting rooms and "phone booths"

Double blackout curtain (video projection) + filtering sheer + interior acoustic wall panels. Budget: €2,500-6,000 excl. VAT per 15-25 m² meeting room.

Reception

Strong aesthetic treatment, often visible from the street: contemporary high-end curtain (380 g/m² Trevira CS, bold design), floor-to-ceiling height, wave pleating. Budget: €180-320 excl. VAT/m² installed.

Executive / Chairman office

Premium treatment: double-layer curtain (interior velvet + exterior linen sheer), silent KNX motorisation, bespoke finishing. Budget: €350-700 excl. VAT/m² installed.

Break / lounge employee areas

Opportunity for ambitious textile treatment (strong colours, patterns, varied textures) to create a break from the open-space. Decorative acoustic panel + light curtain. Budget: €100-200 excl. VAT/m² floor area.

6. Motorisation: when it becomes essential

Pragmatic rules:

• Height > 2.80 m: motorisation recommended (tedious manual handling).
• Width > 3.50 m: motorisation almost mandatory (significant weight, derailment risk).
• Meeting room with video presentation: motorisation imperative (usage comfort, "tech" image).
• Executive office: motorisation expected at the position standard.
• Building with BMS / BMS: motorisation with BMS feedback for centralised piloting (time scenarios, automatic solar management).

Motor budget: €220-450 excl. VAT/lm standard motorised rail, +€150-250 excl. VAT/lm for KNX/DALI/BMS integration.

7. Sample budget — 500 m² office floor Paris 8th

Simulation for a renovated floor:

• 12 individual offices (6 m² glazing each, standard curtain): 12 × €850 excl. VAT = €10,200 excl. VAT
• 1 open-space 200 m² (24 m glazed façade, motorised screen blind): 24 lm × €320 excl. VAT/lm = €7,680 excl. VAT
• 3 meeting rooms (motorised curtain + sheer): 3 × €2,800 excl. VAT = €8,400 excl. VAT
• 1 reception area 40 m² (high-quality floor-to-ceiling curtain): €5,400 excl. VAT
• Open-space acoustic wall panels (25 m² at €260/m²): €6,500 excl. VAT

Total: ≈ €38,200 excl. VAT, i.e. €76 excl. VAT/m² floor area for a complete textile renovation of a high-end office floor.

8. The 5 errors to avoid in office textile renovation

1. Forgetting home-automation coverage: in 2026, a new or renovated office without centralised blind/curtain piloting is disqualified on BREEAM/HQE criteria and on rental attractiveness.
2. Under-estimating the number of manipulations: an open-space curtain opened/closed 300 times a year wears out 3 times faster than a hotel curtain. Choose Martindale ≥ 40,000.
3. Neglecting maintenance: an office curtain must be vacuumable in place (compatible fabric) and machine-washable without complex disassembly.
4. Ignoring CSR certifications: Oeko-Tex, EU Ecolabel, Cradle-to-Cradle are becoming standard choice criteria in offices. Integrate them in the CCTP.
5. Treating textile last: specifying textiles after suspended-ceiling installation means accepting visible rails and aesthetic compromises. Integrate from the APS phase.

FAQ — Office curtains

Is a screen blind enough in an open-space or is an additional curtain needed?

For 80% of cases, a motorised screen blind alone effectively treats glare. A curtain is useful as a complement if: (1) total blackout needed (video projection, critical videoconference), (2) warm aesthetic intent, (3) reinforced acoustic performance desired.

Can an office curtain be washed in place?

Vacuuming with a flat nozzle is recommended every 2-3 months. For deep cleaning, count disassembly and industrial dry cleaning every 12-24 months depending on exposure (employee kitchen, former passive smokers, proximity to parking).

What lifespan for an office curtain?

Properly specified FR polyester: 10-15 years in normal office use. Motorised screen blind: 8-12 years, with fabric replacement possible without redoing the motor.

Can office curtains be rented rather than purchased?

Yes, some suppliers offer "textile as a service": long-term rental including maintenance, replacement in case of defect, renewal at 7-10 years. Relevant for office tenants who do not want to bear the CAPEX.

How to handle screen ergonomics in a very glazed south-facing open-space?

Micro-perforated screen blind with 5-7% openness, motorised with luminosity feedback (outside sensor), or filtering sheer curtain with weighted bottom hem. In both cases, avoid blackout curtains that plunge screens into shade and degrade visual comfort.

In summary

Choosing office curtains in 2026 means arbitrating between 3 simultaneous dimensions: visual comfort (screen, filtering sheer), acoustic performance (complementary contribution to wall panels), and regulatory compliance (M1 minimum, valid test report). The reference materials are FR Trevira CS polyester and its recycled variants, mounted on motorised systems integrated into the building's BMS.

2026 reference budget: €70-110 excl. VAT/m² floor area for a complete office textile renovation, all items combined. An investment that pays back in 2-4 years through reduced eye fatigue, improved concentration, and rental valuation of the building.