Kranite Aluminium has introduced aluminium roofing in Nigeria and has set the standards for it. Being one of the very few vertically integrated aluminium companies in Nigeria, Kranite Aluminium can guarantee the quality of the product, from alloy composition to the installation of the roof. Our customers do not have to worry about distortion, leakages or fading of colours.
Kranite Aluminium does not compromise on quality. Because of this, we use the superior 'Stucco' embossing method for our sheets. Embossing is the mechanical deformation of the surface of the sheet to give it the needed mechanical properties, such as strength. Where other suppliers use a less effective 'Diamond' pattern, Kranite Aluminium will only supply the Stucco pattern.
Kranite Aluminium is one of the few Nigerian companies which produces aluminium sheets. This process starts with remelting aluminium scrap. Aluminium is one of the rare materials that do not degrade in recycling. Most of the aluminium used today is recycled, with the same properties as primary aluminium. But at much lower energy cost. Aluminium therefore is the greenest metal on earth.
After melting the scrap, the aluminium ingots are produced. Of course we check and control the chemical composition of the alloy. These ingots are flattened by a hot-rolling machine, and 2 cold-rollers. Each step makes the sheet a bit thinner, until the by the customer desired thickness has been reached.
Kranite Steel and Aluminium operates 2 high speed coil coating lines, with a capacity of 20,000 tons per year. The sheet is degreased using the alkaline solution in the pre-treatment section of the coating line. It helps in etching and degreasing to remove the oily residue from surface for better and long lasting paint adhesion.
The initial coat is the primer, its dry thickness usually in the range of 3 to 5 microns, to provide adhesion to the pre-treated metal for better paint adhesion and added corrosion resistance. Aluminium sheet will be roll-coated with a universally accepted S wrap coater for reverse coating application to provide uniform backing coat and topcoat The final coat, or topcoat, is usually in the range of 15 to 25 microns and it provides the colour and appearance to the final coated product along with the other key properties required to meet the product's performance specification. The bottom coat is transparent backing lacquer, usually in the range of 5 to 7 microns.
The painted strip is then baked / oven dried either in Gas fired oven or the state of the art IR oven. This is a critical process with close monitoring of strip temperature and speed of the strip. This is then followed by cooling the strip by initial Air quenching and then water quenching and coiling the strip.
Kranite Aluminium has a long experience in executing projects. A project for us covers the whole process, from co-engineering, advising, measuring, production, installation and after sales service. Within KraniteAluminium a special project team takes care of the coordination of all these activities. Roofing projects are done as well for individuals as for big international groups. Often special demands have to be met. Often special material has to be developed. KraniteAluminium has the organisation and capability to do this.
Our range of products and services are extensive covering all types of Aluminum doors, windows, Structural glazing's (unitized and semi unitized) systems, curtain walls, Aluminum. Composite claddings (interiors and exteriors), Internal office partitioning systems and false ceilings..