ETFE Roof Design for Commercial Plazas: Hongcheng Plaza Case Study

Commercial Application: ETFE Roof Solution for Commercial Complexes

The Hongcheng Plaza project demonstrates how tensile membrane structures can transform modern commercial environments by combining architectural identity, public space creation, and functional performance.

Located within a major urban commercial district, this ETFE membrane roof was designed to serve more than weather protection. The lightweight roofing system creates a comfortable semi-outdoor environment for retail, landscape, and pedestrian circulation while maintaining an open visual connection between architecture and nature.

For commercial developments such as shopping malls, mixed-use complexes, and urban plazas, ETFE membrane systems provide unique advantages including high natural light transmission, lightweight structural solutions, and distinctive architectural forms that enhance visitor experience.

Introduction: Redefining Public Space Through Lightweight Architecture

Modern commercial developments are expected to provide more than retail space.

Today’s mixed-use projects must create attractive public environments that encourage visitors to stay longer, interact with the surrounding landscape, and experience the destination beyond shopping.

The Hongcheng Plaza ETFE Roof project demonstrates how membrane architecture can transform a conventional commercial complex into a vibrant urban destination. By combining ETFE membrane technology, landscape integration, and innovative structural design, the project creates a public space that functions as both a commercial hub and a community gathering place.

Design Challenge: Covering Large Public Spaces Without Losing Openness

One of the primary challenges in commercial plaza design is balancing environmental protection with visual openness.

Traditional concrete and glass roofs often increase structural loads and create enclosed environments that disconnect visitors from natural light and outdoor landscapes.

For Hongcheng Plaza, the design objective was to create a lightweight roofing system capable of:

Providing weather protection
Maximizing natural daylight
Supporting landscape integration
Maintaining visual transparency
Enhancing the overall visitor experience

The solution was a large-scale ETFE membrane roof system inspired by natural forms.

The Fish-Scale ETFE Roof Concept

The most distinctive feature of the project is the 9,800-square-meter ETFE roof composed of overlapping membrane elements that resemble fish scales.

The design draws inspiration from the traditional Chinese symbol of the carp, representing prosperity, harmony, and positive development.

Rather than functioning as a simple roof, the membrane structure becomes an architectural identity for the entire development.

The layered geometry creates visual depth while allowing sunlight to filter into the public spaces below, generating dynamic lighting effects throughout the day.

Why ETFE Was Selected for This Commercial Plaza

ETFE membrane technology offers several advantages for large-scale public and commercial environments.

Lightweight Structural Performance

ETFE is significantly lighter than conventional glass systems, reducing structural demands and allowing greater design flexibility.

High Natural Light Transmission

The membrane permits high levels of daylight penetration, creating bright public spaces while reducing reliance on artificial lighting.

Weather Resistance

ETFE performs exceptionally well under long-term exposure to sunlight, rain, and environmental pollutants.

Design Freedom

Its flexibility enables the creation of organic forms and free-flowing geometries that are difficult to achieve using traditional building materials.

Structural Engineering and Landscape Integration

The roof is supported by large tree-inspired structural columns combined with stainless-steel shell elements.

This approach creates a visual relationship between architecture and nature.

The structural system allows the landscaped central garden to extend beneath the membrane canopy and visually connect with surrounding retail spaces.

As a result, visitors experience a continuous environment where architecture, landscape, and public activity merge together.

The design reinforces the concept of an urban “Central Park” within a dense commercial district.

Sustainable Design Benefits

Beyond aesthetics, the ETFE roof contributes to environmental performance.

Natural Daylighting

The translucent membrane reduces the need for artificial lighting during daytime hours.

Rainwater Collection

The roof geometry supports an integrated rainwater management system that helps improve site sustainability

Reduced Material Consumption

The lightweight nature of ETFE minimizes structural steel requirements compared with traditional roofing solutions.

Improved User Comfort

Visitors benefit from weather protection while maintaining a strong connection to outdoor environments.

Project Outcome

The completed Hongcheng Plaza ETFE Roof has become one of the defining architectural elements of the development.

Its fish-scale-inspired design successfully combines cultural symbolism, structural innovation, and environmental performance.

More importantly, the project demonstrates how ETFE membrane architecture can transform public commercial environments into memorable urban destinations that encourage social interaction, retail activity, and long-term community engagement.

Explore Similar Commercial ETFE Projects

Interested in other commercial ETFE roofing projects? Explore more applications across shopping malls, urban landscapes, mixed-use developments, and atrium renovations.

Hangzhou Yintai Plaza – China’s first hybrid ETFE canopy combining single-layer and air cushion systems.
Jinza Real Estate – Voronoi-pattern ETFE roof designed for a landmark mixed-use development.
Hangzhou Bodo Sangu – Glass atrium renovation using ETFE cushions for improved daylight and energy efficiency.
Hangzhou Xiaohe Park – Large-span ETFE landscape canopy inspired by contemporary architecture.

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