UK - VMZINC webinar, Zinc as a building envelope - June 2020

Introduction

This tutorial explores the use of zinc as a building envelope, covering its historical context, production methods, applications, finishes, and sustainability. Understanding these aspects can help architects, builders, and designers make informed decisions when considering zinc for construction projects.

Step 1: Understand the History of Zinc in Construction

• Zinc has been used in architecture since the 19th century.
• It gained popularity due to its durability, low maintenance, and aesthetic appeal.
• Historical examples include the use of zinc in roofing and facades in various European buildings.

Step 2: Learn About Zinc Production

• Zinc is extracted from ore through a process called smelting.
• The production involves:
  1. Mining zinc ores.
  2. Crushing and grinding the ore.
  3. Extracting zinc through pyrometallurgical or hydrometallurgical methods.
• The environmental impact is a consideration, leading to more sustainable production practices.

Step 3: Explore Applications of Zinc in Building Envelopes

• Zinc can be used in various forms, including sheets, tiles, and panels.
• Common applications include:
  • Roofing: Provides a waterproof barrier.
  • Cladding: Adds aesthetic value and protects the structure.
  • Gutters and downspouts: Offers durability and corrosion resistance.
• Zinc's flexibility allows for creative architectural designs.

Step 4: Examine Finishes Available for Zinc

• Zinc can be finished in several ways to enhance its appearance and durability:
  • Natural finish: Develops a patina over time.
  • Pre-weathered finish: Offers a consistent look.
  • Coated finishes: Available in various colors and textures.
• Consider the desired aesthetic and performance characteristics when choosing a finish.

Step 5: Assess the Sustainability of Zinc

• Zinc is a sustainable material due to its recyclability and longevity.
• Key sustainability points include:
  • Low energy consumption in production compared to other metals.
  • 100% recyclable without loss of properties.
  • Contributes to energy efficiency in buildings when used as a thermal envelope.

Conclusion

Zinc is a versatile and sustainable choice for building envelopes, with a rich history and numerous applications. Understanding its production, finishes, and environmental impact can aid in making informed design decisions. For further exploration, consider researching specific case studies or advancements in zinc technology in modern architecture.