Why Thermal Breaks Are Essential in Aluminium Doors and Windows
Thermal breaks are crucial for improving the energy efficiency of aluminium doors and windows. While they aim to reduce heat loss, the benefits go far beyond just fuel expenses and condensation issues. This article explores the importance of thermal breaks, the challenges faced by early efforts, and the structural and visual advantages of aluminium over uPVC in building construction.
Introduction to Thermal Breaks
Thermal breaks are designed to inhibit heat flow through the aluminium extrusions of doors and windows. These breaks are implemented to enhance the overall thermal performance of the materials, making them more energy-efficient. However, it is important to note that their impact on reducing fuel bills and minimising condensation is often negligible. Despite these modest effects, thermal breaks have become an essential feature in modern aluminium fenestration systems.
Efforts to Implement Thermal Breaks
Several innovations have been introduced in the industry to address the thermal conductivity of aluminium. One notable example is the system developed by Kawneer /AMAX, where a one-piece extrusion was filled with resin, and a section of aluminium was subsequently machined away. Another approach involved a two-piece extrusion joined by a separate thermal break. While these methods did introduce some level of thermal insulation, they were both labour-intensive and costly, and their effectiveness as an insulated system was limited.
Structural and Visual Advantages of Aluminium
Despite the challenges, manufacturers continue to strive for better thermal performance in aluminium doors and windows. This is because aluminium offers several advantages over uPVC (unplasticised polyvinyl chloride). Aluminium windows, doors, and curtain walling are superior in terms of both structural integrity and aesthetic appeal. Here are the key advantages:
Increased Durability
Aluminium is a highly durable material, resisting damage from many domestic chemicals and prolonged exposure to sunlight. In contrast, uPVC is a plastic and tends to degrade more easily under similar conditions. This makes aluminium a more robust choice for long-term structural requirements in buildings.
Improved Resistance to Damage
Aluminium’s strong resistance to damage and its ability to maintain its appearance over time make it an ideal material for high-quality, long-lasting fenestration solutions. On the other hand, uPVC can be easily damaged by chemicals and excessive sunlight, leading to a shorter lifespan.
Conclusion
In conclusion, while thermal breaks may not drastically impact your fuel bills or significantly reduce condensation, they are still essential features in aluminium doors and windows. These breaks are crucial for enhancing the thermal performance of aluminium, which is inherently not an insulating material. The combination of structural superiority and visual appeal makes aluminium windows and doors a preferred choice over uPVC in modern construction.