When it comes to creating facades that stand the test of time, selecting and specifying the correct materials is the foundation of success. For developers, main contractors, building owners, facility managers, and surveyors, material choices can significantly influence both the longevity and cost-efficiency of a building’s envelope. This blog explores the essential considerations for selecting robust materials and highlights strategies to maximise facade performance over its lifecycle.
Key Considerations for Selecting Facade Materials
1. Anodised Finishes
Anodising creates a protective oxide layer on aluminium surfaces, offering exceptional resistance to corrosion and wear. Ideal for urban or coastal environments, anodised finishes outperform painted or powder-coated alternatives by integrating into the metal itself.
Advantages of anodised finishes include:
- Long-lasting aesthetic quality, even under UV exposure.
- Low maintenance needs and the ability to be restoratively cleaned to near-original condition.
2. Vulcanised Gaskets
Hot vulcanised gaskets, used in curtain walls and openable windows, are essential for preventing air and water ingress. While linear gaskets may be more cost-effective initially, they often shrink over time, leading to leaks and increased maintenance demands.
Vulcanised gaskets offer a better solution by:
- Being factory-made in one piece to eliminate gaps and reduce site workmanship errors.
- Enhancing long-term air and water tightness, contributing to lower operational costs.
3. Glass and Glazing
Glass is a defining feature of modern facades, but its specification requires careful attention. Good quality double-glazed units typically last 25–30 years, but poorly selected glazing can lead to safety risks, energy inefficiencies, and overheating.
Key tips for glazing selection:
- Align specifications with the building’s acoustic, thermal, and safety requirements.
- Work with trusted suppliers who maintain strict quality controls on edge seal components and processing.
4. Interlayers
Interlayers, used between glass plies in balconies or glazing units, add strength and safety to facades. Choosing the right interlayer material is crucial for preventing delamination—a process where layers separate over time, leading to weakened integrity and unsightly discoloration.
To ensure durability:
- Opt for interlayers specifically designed for external use, such as ionoplast products, which resist moisture and contaminants.
- Incorporate moisture management features like trims, drainage systems, and protective detailing to shield interlayer edges from prolonged exposure.
Long-Term Benefits of Robust Material Selection
Choosing resilient materials from the outset provides significant advantages, including:
Extended facade service life.
Lower maintenance costs over time.
Improved energy efficiency and reduced carbon footprint.
Enhanced occupant comfort and building value.
Conclusion
Selecting and specifying robust materials is a crucial step in ensuring your building’s facade delivers on durability, performance, and cost-effectiveness. For a deeper dive into facade strategies, download our comprehensive report, Long-Lasting Facades: Core Strategies for a Sustainable Building Lifecycle, or get in touch with our team of experts to discuss your project needs.
