The table below summarizes the typical design life for common membrane materials:

What are the key factors affecting the price of membrane structure carports?

1. Membrane Material Type: The Primary Factor for Price Differences

Different membrane materials vary significantly in performance and price, directly determining the grade and budget of the carport. Common membrane materials include PVC, PVDF, PTFE, and ETFE.

2. Structure and Shape: Complexity Determines the Budget

Different shapes involve varying design difficulty and material consumption, leading to significant price differences. For example, the simplest "7-shaped" carport costs less, while large-span designs (up to 20–30 meters) have higher unit prices due to more complex structures (no columns required).

3. Project Scale and Geographic Location

Project scale: Larger areas generally result in lower unit prices. For instance, small residential carports (15–30㎡) may cost between 500–1500 RMB/㎡, while medium-to-large projects benefit from spreading fixed costs like transport and installation, reducing the unit price.

Geographic location: The location of the construction site affects transport and labor costs. Remote areas or first-tier cities typically have higher logistics and labor expenses.

Geology and climate: Difficult terrain (e.g., slopes) increases foundation costs. Coastal and northern regions also require wind-resistant, corrosion-proof, and snow-load-resistant designs, which affect cost.

4. Additional Features

Adding lighting systems, drainage systems, smart charging piles, photovoltaic modules, or smart parking management systems can increase total costs by 10%–30%.

Summary

The cost of a membrane structure carport is mainly determined by membrane material grade, shape complexity, and area. PVC is economical, PVDF is durable, and PTFE is high-end. Understanding these factors helps you budget accurately and choose the right solution.

If you have any needs for membrane structure carports, feel free to contact us: 136 000 65322 (whatsapp) or mail to canobbio@canobbio.com.cn.

To learn more about membrane structure carports, please visit: https://www.cantensile.com/car-parking-shade_c42.

In tensile membrane structure engineering, the three most mainstream membrane materials are PTFE, PVC, and ETFE.

In simple terms:

* PTFE is the high‑performance "permanent building material"

* PVC is the cost‑effective "economic choice"

* ETFE is the ultra‑light "transparent soft glass"

• Feature	PTFE (Polytetrafluoroethylene)	PVC (Polyvinyl Chloride)	ETFE (Ethylene Tetrafluoroethylene)
  Structure & Material	Coated fabric: glass fiber base fabric coated with PTFE	Coated fabric: polyester fiber base fabric coated with PVC	Homogeneous material: no base fabric, made directly from ETFE resin
  Light Transmission	Medium to high (10%–50%); diffused light, no glare	Low (10%–35%)	Very high (>95%) – "soft glass", adjustable
  Self Cleaning & Service Life	Best: >30 years; non stick surface, rain cleaned	Fair: 10–15 years; prone to aging and dirt accumulation	Excellent: 20–35 years; smooth surface resists dirt
  Mechanical & Installation	High strength but stiff, poor foldability, high fabrication precision required	Good flexibility, easy to fold and process, but lower strength and prone to creep	High tensile strength, elongation >400%, weight only 1% of glass
  Typical Applications	Large permanent buildings (stadiums, airports)	Temporary or semi permanent structures (canopies, exhibition halls, small architectural features)	Landmark / viewing buildings (Water Cube, botanical gardens, atriums)
  Approximate Price	60~120$/sqm	20~60$/sqm	100~200$/sqm

  
  

Detailed Differences

* PTFE (Polytetrafluoroethylene) is a high‑performance, permanent membrane material. It uses high‑strength glass fiber as the base fabric, coated with stable PTFE resin. This gives it excellent tensile strength, aging resistance, and chemical corrosion resistance, with a normal service life of over 30 years. Its "non‑stick" property also provides superior self‑cleaning – rain easily washes away dirt. The downsides are higher material and installation costs, and the material is relatively stiff and not easily foldable.

* PVC (Polyvinyl Chloride) is the economic, general‑purpose membrane. It uses polyester fiber as the base fabric, has the lowest cost, and is soft and easy to shape into complex forms. However, its main weakness is poor weather resistance and self‑cleaning – prolonged UV exposure leads to aging and dirt accumulation. To improve this, manufacturers often apply a top coating of PVDF or TiO₂. The enhanced product is commonly called PVDF membrane.

* ETFE (Ethylene Tetrafluoroethylene) is a transparent, lightweight membrane. Its structure is completely different from the other two – it is a single‑layer thermoplastic film without any fabric reinforcement. Its most notable feature is extreme transparency, with light transmittance over 95%. It is also extremely lightweight, highly flexible, and often used in pneumatic cushion systems, as seen in landmark buildings like the Beijing Water Cube. The disadvantages are high cost and vulnerability to puncture, which can cause deflation in air‑supported systems.

If you have a specific project (e.g., a parking canopy, stadium, or landscape feature) and a budget range, please you could contact us for more details: canobbio@canobbio.com.cn.

To put it simply, a membrane structure is a broad architectural category, while tensile membrane and spatial membrane are subsets or common terms based on different classification criteria. The relationship is one of inclusion, not equality.

Here is a detailed explanation.

1. What is a Membrane Structure?

A membrane structure is a building system consisting of high-strength flexible membrane materials (such as PTFE, PVC, or ETFE) and a supporting structure (steel frames, cables, or air pressure). The membrane forms a spatial shape through its own tension or internal air pressure, enabling it to withstand external loads (wind, snow, self-weight, etc.).

*Core Principle: Utilizes the material's tensile strength (not bending or compression strength). The membrane is stretched tight like a drumhead, creating stiffness to bear loads.

Three Main Types (based on structural mechanics):

1. Tensile Membrane Structure: Shaped by applying pretension to the membrane using steel cables and boundary supports.

2. Frame-Supported Membrane Structure: The membrane is draped over a rigid steel frame (arches, space frames), relying on the frame for shape.

3. Pneumatic (Air-Inflated) Membrane Structure: Shaped by internal air pressure (two subtypes: air-supported and air-inflated).

2. What is a Tensile Membrane?

A tensile membrane is the most classic and expressive type of membrane structure. It's the common name for tensile membrane structures.

*Characteristics: The shape is maintained entirely by three-dimensional equilibrium tension between the membrane, steel cables, and rigid boundaries (ground, beams, columns). There are no internal support frames (no poles pushing up from inside).

*Typical Examples: The famous Munich Olympic Park roof, canopies around Beijing's "Bird's Nest" stadium, large landscape tents, gas station canopies.

*Intuitive Understanding: Like an inverted umbrella being pushed up by the wind from below – the membrane is the canopy, the cables are the ribs, but both work together to bear the load.

3. What is a Spatial Membrane?

The term "spatial membrane" does not have a strict, unified engineering definition. Its meaning varies by context:

*Common Meaning 1 (3D Curved Shape): It emphasizes that the membrane creates a non-planar, doubly curved shape (e.g., saddle form, dome). Almost all tensile membranes and some frame-supported membranes are "spatial membrane structures," distinguishing them from flat membranes (like a simple awning).

*Common Meaning 2 (Analysis Method): In structural design software, "spatial membrane" sometimes refers to a membrane element analyzed using spatial finite element methods (considering 3D deformation).

*Common Meaning 3 (Trade Jargon): Some vendors call a frame-supported membrane with a curved shape (e.g., a park canopy with an arched steel frame) a "spatial membrane" to differentiate it from the more expensive "tensile membrane."

Key Point: In strict academic classification, "spatial membrane" is not an independent type. When people use this term, they usually mean either a "tensile membrane" (because of its strong spatial feel) or a "frame-supported membrane structure."

Summary of Differences (Clear Comparison Table)

Aspect	Membrane Structure (Broad Category)	Tensile Membrane (Sub-type)	Spatial Membrane (Vague Term)
Relationship	The general term	A specific type of membrane structure	Not a standard type; often refers to tensile or curved frame-supported membranes
Load Bearing	Tension, frame compression, or air pressure	Pure tension (no internal frame)	Either tension or frame compression
Internal Supports	Possible (e.g., poles, frames)	None (touches ground only at boundaries)	Possible (if referring to frame-supported)
Form	Can be flat or spatial	Must be a 3D double-curved surface (otherwise cannot be tensioned)	Emphasizes a spatial curved shape
Cost	Frame-supported: cheaper; Tensile: more expensive	Higher (complex form-finding, cables, connections)	If meaning tensile → expensive;If meaning frame-supported → cheaper
Typical Example			Small carports, corridor roofs (with arch frames)

One-Sentence Summary

*Membrane Structure = The parent (big family).

*Tensile Membrane = The talented child (most beautiful, technically core, relies purely on stretching).

*Spatial Membrane = The neighbor's nickname (not formal, often refers to a cheaper version that looks like a tensile membrane but has a frame, or simply any 3D membrane).

If any membrane structure project, please  mail to canobbio@canobbio.com.cn.

1.  Long life span: normally the suppliers provide 10-15 years warranty, but life span is over 30 years;

2. Fireproofing, High transmittance, Light weight;

3. Strong  self cleaning ability: Because of its strong self cleaning ability, the PTFE tensile structure will become whiter after explosing to the sun.

please find below video comparasion of one PTFE tensile structure shooting in April and July, 2020, you can find it becomes whiter and more pretty over time.