Lightweight film material for transparent roofs, façades, skylights and pneumatic cushion envelopes.
DERFLEX supports architects, façade contractors, membrane fabricators, EPC teams and distributors with ETFE film direction, layer-by-layer thickness discussion, visual samples, printed-film communication, roll planning and export-ready supply. Final structural design, cushion fabrication, framing, inflation controls and code approval should be coordinated by the appointed specialists.
An ETFE structure is a lightweight building-envelope system in which transparent or translucent ETFE foil is tensioned as a single skin or welded into air-supported cushions. The visible film is only one part of the assembly. The finished result also depends on panel geometry, seams, aluminium perimeter profiles, gaskets, drainage, supporting steel or cables, pressure control, installation tolerances and the local load strategy.
This distinction matters during purchasing. A request for “ETFE structure price per square metre” can refer to film only, fabricated panels, framed cushions, inflation equipment or a complete installed package. DERFLEX organizes the material discussion around the intended system so buyers can separate the foil-supply scope from specialist engineering and construction responsibilities.
The right route depends on span, climate, transparency, thermal target, frame geometry, fabrication capability and maintenance strategy.
One foil layer is mechanically pre-tensioned and restrained by a frame, cable network or secondary support. The build-up is visually light and comparatively direct, while insulation, acoustics and deflection must be reviewed at system level.
Two or more foil layers are welded around the perimeter and maintained at controlled low pressure. Cushion rise, layer count and print position can be coordinated to pursue daylight, shading and thermal objectives.
Cables, steel grids or aluminium members control larger foil fields and complex geometry. The structure may combine stressed foil, cushions and rigid envelope interfaces within one architectural system.
A multi-layer ETFE cushion is not created by stacking film alone. The system must keep its shape under changing wind, rain, snow and temperature conditions while managing water, air pressure, movement and interfaces with the primary structure.
ETFE is most relevant when transparency, low envelope weight and architectural form are central to the brief. Final performance remains project- and system-dependent.
Clear foil can provide high visible-light transmission, while printed, tinted or layered directions can be discussed to manage glare and solar exposure.
The low mass of foil panels can support lighter roof and façade concepts than many rigid glazing solutions, subject to the engineer’s complete structural design.
Flexible film and pneumatic modules can follow expressive grids, long curves and non-standard envelope geometries that would be difficult to reproduce with rigid panels.
ETFE has a smooth fluoropolymer surface that can reduce dirt retention. Access, drainage and cleaning plans should still reflect the project environment.
Frit patterns, translucent effects and backlighting can contribute to solar control and nighttime identity after physical samples and mock-ups are approved.
Roof or façade fields can be divided into coordinated modules, helping teams plan fabrication, delivery, access and potential future panel replacement.
The material is used where the building envelope needs daylight, visual lightness and geometry-specific engineering.
Roof edges, concourses, façade bands and entrance zones can use ETFE to create a bright and recognizable venue envelope.
Large skylights, covered links and terminal halls can combine weather protection with natural light and lightweight support concepts.
Shopping centres, hotel courts and entertainment spaces can use clear or fritted cushions to shape daylight and the central public experience.
Single skins or cushion modules can create transparent, translucent, patterned or illuminated façades with a distinct visual rhythm.
Conservatories, exhibition gardens and education buildings may evaluate ETFE where daylight transmission and lightweight enclosure are important.
Museums, pavilions, libraries and covered plazas can use ETFE as a contemporary roof or façade element subject to local performance requirements.
The table is an RFQ starting point, not a substitute for calculations, approved samples, assembly testing or destination-market review.
| Product Direction | Architectural ETFE film or foil for transparent and translucent roof, façade, skylight and cushion-envelope applications. |
|---|---|
| Material Structure | Extruded ETFE fluoropolymer film without woven reinforcement. Installed performance depends on foil, welds, clamps, frames, air system and engineering. |
| Thickness Discussion | 100 μm, 150 μm, 200 μm and 250 μm are common early-stage project directions. Final thickness should follow stress calculations and the selected layer arrangement. |
| System Types | Single-layer stressed skin, cable-supported foil, two-layer cushion, three-layer cushion or specialist multi-layer envelope. |
| Appearance | Clear/natural, translucent, white direction, project tint, dot or frit print, patterned film or lighting-oriented concept, subject to feasibility and sample approval. |
| Design Inputs | Plan and section drawings, module sizes, span, support spacing, building height, orientation, design loads, drainage concept and maintenance access. |
| Fabrication Inputs | Roll width, panel nesting, welding equipment, seam trials, splice policy, print registration, handling limits and fabricator acceptance criteria. |
| Commercial Inputs | Estimated quantity, sample schedule, delivery sequence, packaging, labels, project documents, destination and target order stage. |
| DERFLEX Support | Material-direction review, thickness discussion, sample and visual communication, printed-film coordination where applicable, roll quotation, packing and export delivery planning. |
Clear responsibility boundaries help project teams compare quotations, manage risk and identify the specialists needed for the finished envelope.
No material is universally suitable. The strongest specification follows the building objective, not a headline feature.
| Decision Factor | ETFE Structure | Glass System | PTFE Membrane | PVC/PVDF Membrane |
|---|---|---|---|---|
| Primary visual direction | Clear, translucent, printed or illuminated lightweight envelope | Rigid transparency and crisp glazed appearance | Diffused white permanent membrane expression | Opaque or translucent fabric with broad color options |
| Weight direction | Very low film weight; complete system still requires engineered supports | Higher panel and framing dead load | Lightweight reinforced membrane | Lightweight reinforced membrane |
| Typical design priority | Daylight, low weight and expressive geometry | Clear views, acoustic mass and conventional façade detailing | Long-life tensile roofs and diffused light | Cost balance, weldability, color and flexible fabrication |
| System coordination | Foil stress, welds, clamps, cushion air, drainage and controls | Glass make-up, anchors, mullions, seals and drainage | Patterning, edge details, steel/cable system and tensioning | Patterning, welding, reinforcement, fixing and surface finish |
| Strong candidate when | Transparency and low envelope mass define the architecture | Rigid high-clarity glazing performance is required | Premium permanent tensile architecture is intended | Commercial tensile structures need practical cost and customization |
DERFLEX focuses on B2B architectural-film supply and specification communication. The goal is not to present film thickness as a complete design answer, but to help professional buyers define the material package around the intended roof, façade or cushion system.
Material discussion connects system type, layer count, appearance, fabrication route and destination requirements.
Clear, translucent, tinted or printed directions can be reviewed through samples and agreed visual references.
Roll format, nesting, welding trials, splice rules and handling requirements can be discussed with the fabricator.
Packaging, labeling, documents and phased delivery can be aligned with international project procurement.
Film supply is distinguished from system engineering, cushion fabrication, controls, installation and code approval.
Six closely related DERFLEX pages help buyers move from broad structure planning to material, roof, façade and cushion-system decisions.
Film structure, thickness directions, visual options and architectural uses.
System ContextLayer count, air chambers, perimeter frames, controls and quotation inputs.
Façade ApplicationWind, drainage, transparency, printing and lightweight building skins.
Roof ApplicationSkylights, atriums, transit canopies and pneumatic roof envelopes.
Procurement GuideSupplier-scope questions, samples, roll formats and project documentation.
Selection GuideCompare transparency, design life, fabrication, budget and project objectives.
Practical answers for architects, contractors, membrane fabricators, developers and procurement teams.
No. ETFE structure is a broad term covering single-layer stressed foil, cable-supported film, pneumatic cushions and hybrid roof or façade assemblies. An ETFE cushion is one system type made from two or more welded foil layers maintained at controlled low pressure.
Early discussions commonly include 100, 150, 200 and 250 μm film. The final thickness for each layer depends on module dimensions, design loads, foil stress, cushion geometry, printing, fabrication and the calculations of the responsible engineer.
DERFLEX focuses on ETFE material supply and project specification communication. A complete installed structure normally also requires specialist structural engineering, cutting and welding, aluminium profiles, air controls, drainage, installation, commissioning and local-code approval. The required scope should be defined in the inquiry.
Printed frit patterns, translucent directions, project tints and lighting-oriented concepts can be discussed subject to production feasibility. Print coverage and layer position influence daylight, glare, solar performance and visual consistency, so physical samples and mock-ups are recommended.
No. Pneumatic cushions require controlled air supply and monitoring. A single-layer stressed skin does not use cushion inflation, but it still needs designed pre-tension, edge clamping, support geometry, movement allowance and structural verification.
Send the project type, location, drawings, module dimensions, intended system, layer count, early thickness direction, visual target, estimated quantity, fabrication location, required documents, delivery stage and whether the request covers film only or a wider package.
Share your system type, drawings, layer count, film appearance, quantity, fabrication route and destination. DERFLEX will review the material-supply direction and identify the information that still requires specialist engineering confirmation.