Winblok® The Total Window System is the perfect modular window. Build them in as you want, to create the ideal window for your specific application. We have decided to offer a variety of different ‘Winblok® Window Combinations‘ that work well in many different applications. All Combinations include the Winblok® precast concrete window frame, including pre-glazed aluminium Tophung projecting out Winvent®. Manufactured from aluminium extruded sections, which are powder coated finished. All Direct Fixed glass is supplied as 4mm TSG (Toughened Safety Glass) to prevent cracking. The handle is injection moulded in black. Weather seals are wool pile. The adjustable friction stays are in 304 stainless steel. Our Winvent® Tophung windows are compliant with both SANS 10400-XA (energy performance) and SANS 613 (air and water filtration/penetration).