Tensile Membrane Roofing Material PVC
Tensile membrane roofing material PVC is a flexible, fabric-reinforced architectural membrane designed for tensioned structures. The material consists of a high-tenacity polyester (PET) or fiberglass scrim, coated on both sides with a PVC compound formulated for weatherability, flame retardance, and weldability. The coating includes plasticizers, stabilizers, biocides, and UV absorbers. The membrane exhibits tensile strength between 250 and 500 N/50mm (depending on scrim weight), tear propagation resistance above 150 N, and adhesion between coating and scrim exceeding 50 N/50mm. The material meets EN 14716 and ASTM D4850 standards for tensile structures. Surface finishes include PVDF or acrylic topcoats for enhanced self-cleaning properties.
250-500Tensile strength (N/50mm)
0.6-1.8Thickness (mm)
-30Cold flexibility (C)
B1Fire rating (DIN 4102)
Structural Properties
- Warp tensile strength: 350-500 N/50mm (ASTM D751)
- Weft tensile strength: 300-450 N/50mm
- Elongation at warp break: 15-25%
- Elongation at weft break: 20-30%
- Tear strength (trapezoid): 180-250 N
- Adhesion strength (coating to scrim): 60 N/50mm
Weathering & Durability
- UV resistance: 10-year warranty on surface coating
- Temperature range: -30 C to +70 C
- Water penetration: 0.2 g/m2 per 24h (ASTM E96)
- Chemical resistance: pH 3-11 (acids, alkalis, salts)
- Mildew resistance: fungicidal additives incorporated
- Reflectance: initial 80% (white), 65% (light grey)
Fabrication & Installation
- Weld method: hot air or wedge welding (400-600 C)
- Welding strength: 80% of base material tensile
- Foldability: minimum bending radius 20x thickness
- Pretensioning: 1.0-2.5 kN/m recommended
- Edge finishing: keder, rope or welded hems
- Roll length: up to 50 m, width: 1.0-3.2 m
Design Parameters for Tensile Structures
| Minimum radius of curvature (synclastic) | 3.0 m |
| Minimum radius of curvature (anticlastic) | 1.5 m |
| Allowable stress (safety factor 4-5) | 25-30% of ultimate tensile |
| Pretension level (recommended) | 1.0-2.5 kN/m |
| Maximum span (with catenary edge) | 12-15 m |
| Wind load resistance (EN 1991-1-4) | Up to 1.8 kN/m2 |
| Snow load capacity | 0.5-1.2 kN/m2 (depending on slope) |
Project Types
Canopies & Walkways
Entrance covers, shopping arcades, pedestrian bridges
Entrance covers, shopping arcades, pedestrian bridges
Stadiums & Arenas
Main roofs, training facilities, retractable covers
Main roofs, training facilities, retractable covers
Transportation Hubs
Airport terminals, railway stations, bus shelters
Airport terminals, railway stations, bus shelters
Exhibition & Event Spaces
Temporary pavilions, trade fair halls, pop-up structures
Temporary pavilions, trade fair halls, pop-up structures
Technical FAQs
What is the design life of PVC tensile membrane?
Design life ranges from 15 to 25 years depending on environment and topcoat. For aggressive UV climates (southern Europe, Middle East), PVDF-coated membranes provide extended service life up to 25 years. In moderate climates, acrylic-coated versions achieve 15-20 years. Regular cleaning (twice annually) extends surface performance.
How does temperature affect tensile membrane behavior?
PVC membranes exhibit thermal expansion coefficient of approximately 5-7 x 10-5 /K. At temperatures above 40 C, material stiffness decreases by 10-15%, requiring adjustment in pretension. At sub-zero conditions, the membrane retains flexibility down to -30 C without cracking. For extreme cold regions, low-temperature plasticizer formulations are available.
What are the acoustic properties of this material?
The membrane has a mass of approximately 1.2-1.8 kg/m2. Sound transmission loss (STL) at 500 Hz is 18-22 dB. Sound absorption coefficient (alpha) is below 0.10, meaning it reflects most sound. For venues requiring acoustic treatment, micro-perforated or laminated acoustic layers can be specified.
How to handle cutting and detailing for complex geometries?
Pattern cutting requires 3D CAD software (e.g., EASY, Forten) to generate flat patterns with seam allowances (30-50 mm). For anticlastic surfaces, fabric must be cut on the bias (45 degrees) to accommodate compound curvature. Seam overlaps are typically 40-60 mm for structural welds, and edge details include keder profiles for tensioning.
Can the membrane be printed on or illuminated?
Yes. The surface accepts UV-curable or solvent-based screen printing for branding or artistic patterns. Translucent versions (light transmission 10-20%) are available for illuminated ceilings or back-lit applications. LED linear lighting can be integrated into edge details or suspension cables.
What are the environmental credentials?
PVC membrane is 100% recyclable at end-of-life through mechanical recycling. The material contains no heavy metal stabilizers (Ca/Zn stabilized). Plasticizers are phthalate-free variants (e.g., DINCH) compliant with REACH and RoHS. Energy consumption for production is approximately 45 MJ/m2, with CO2 footprint of 3.2 kg CO2e/m2.
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