By Pieter Malherbe
Photos by TEVA Windows
For decades, uPVC (unplasticised polyvinyl chloride) window frames have been available in South Africa, yet they remain relatively unknown compared to traditional aluminium options. Committed companies are together championing uPVC as a sustainable and high-performing alternative in the residential and commercial markets, writes Pieter Malherbe, the managing director of TEVA Windows.
When specifiers and potential clients think of windows, the default concept is aluminium. Many people in the building value chain are still unfamiliar with uPVC (unplasticised polyvinyl chloride) window frames, though it has been an option, and available here in South Africa, for years. However, once users are explained just how energy-efficient, durable, and low-maintenance uPVC can be, they quickly realise its value.
The Benefits of uPVC
The advantages of uPVC over traditional materials such as aluminium and wood are extensive.
- Energy efficiency: uPVC is a non-conductive material, meaning it doesn’t transfer heat as aluminium does. This property significantly improves a building’s insulation, keeping interiors cooler in summer and warmer in winter. Energy modelling by my company shows that specifying uPVC windows or changing to them can reduce peak energy usage by up to 60%, and cut annual energy costs by around 25%.
- Low maintenance: Wooden windows require sanding and painting, and aluminium is known to corrode under certain conditions. uPVC, however, requires only occasional cleaning with water and a mild detergent. It doesn’t rust, warp, or fade, making it ideal for South Africa’s harsh UV and climatic conditions.
- Durability and security: uPVC frames are engineered for toughness. They are fitted with steel reinforcements and multi-point locking systems, making them more resistant to break-ins than traditional frames. When combined with double glazing, these windows provide superior levels of security.
- Noise reduction: uPVC windows can be fitted with double (or triple) glazing. This can reduce external noise by up to 38 decibels, creating quieter, more comfortable living spaces even in high-traffic areas.
- Sustainability: uPVC is a lower embodied carbon choice because it requires six times less energy to manufacture than aluminium. Its durability means fewer replacements over the years, reducing waste. It is also fully recyclable.
Setting the Standard for uPVC
Much of the trust in uPVC stems from the performance of manufacturers like REHAU (www.rehau.com), a German-based polymer specialist with over 75 years of expertise in the production of durable, sustainable uPVC systems. Their products have been installed in South Africa for over 30 years, proving their resilience even in the country’s extreme climate.
<PULL OPTION>These systems are designed to outperform South Africa’s stringent building regulations, including the SANS 10400-XA energy usage standards.<END PULL> They incorporate innovative features such as double-glazing compatibility, fusion-welded corners for airtight seals, and UV-resistant formulations tailored for hot climates such as ours.
TEVA Windows partnered with REHAU because their profiles are some of the best in the world. They provide the flexibility to offer clients a product that balances aesthetics, performance, and sustainability.
Overcoming misconceptions and raising awareness
Despite its numerous advantages, promoting the material comes with challenges. <PULLQUOTE>Aesthetics is often a concern – many people assume uPVC looks plastic-like and/or outdated. But modern profiles offer sleek designs that rival aluminium in style and versatility.<END PULL>
Awareness is a problem. Architects and developers often lack information about uPVC. Our company is actively educating the market, providing presentations and training. This helps to promote understanding.
Some clients also worry about the ease of installation because uPVC is an unfamiliar material to them. However, installing such a window is no more complicated than any other system. In fact, uPVC frames are known to be more robust during the construction process, withstanding site conditions better than other materials.
Ben Pierpoint, owner of JVI Development, points out that uPVC usage is gaining traction in the luxury housing market. High-end clients are increasingly prioritising energy efficiency and long-term savings. It fits perfectly into this ethos.
Real-world applications
The effectiveness of this material is evident in various projects. As an example TEVA recently supplied windows for a 150-home development in Gauteng, instead of the originally specified aluminium. The developer wanted a greener, more energy-efficient product. The switch to uPVC meant they delivered better homes at no additional cost.
JVI Development has also installed the product at the prestigious Waterfall Estate in Waterfall City, Gauteng. It says its completed projects have pleased homeowners with the uPVC look and feel, the smooth operation, and the ease of cleaning without scratching. They are also delighted that the product does not transfer heat to the same extent as aluminium and, importantly, does not require ongoing maintenance like timber.
The road ahead
With growing environmental concerns and rising energy costs, uPVC is positioned as the window frame material of the future. As partners, REHAU and TEVA Windows offer a superior product that at the same time promotes sustainable and energy-efficient living. It also delivers on aesthetics and contributes to creating homes that are comfortable, secure, and future-proof.
