The durability and appearance of the roof of metal depends primarily on how it is coated. Types of metal coating There are different, and they differ not only durability and durability, but also the color fastness.
- Polyester (PE)
The basis of this coating is polyester. The material has long been used in the manufacture of metal tiles, has a glossy appearance and is characterized by plasticity and high color stability.
Metal roofing polyester shiny, smooth, relatively inexpensive. It is highly resistant to corrosion and the action of ultraviolet rays, that is, it will not fade long under the sun. However, in thin layers (up to 30 microns) it is damaged during light mechanical impacts, for example, when snow layers melt from the roof. Do not use polyester where weather conditions are adverse.
- Matte Polyester (PEMA)
Among types of metal coatings Matte polyester looks the most attractive. This is polyester with Teflon added to it, which creates a matte finish. In addition to resistance to the action of UV rays, it also has an increased resistance to mechanical damage due to the increased coating thickness (35 μm). Even in difficult weather conditions will last a long time.
- Pural (PU)
Metal tile coated Pural It is based on polyurethane, the molecules of which are modified by polyamide. The coating thickness is 50 μm, which gives it additional mechanical stability. Ultraviolet and even chemically aggressive substances, such as acids, precipitated with precipitation in areas with polluted air, do not change the properties coated metal tiles. It serves for a long time without discoloration and mechanical resistance in any conditions.
The surface of the metal silky to the touch and matte in appearance. Due to the properties of Pural, the roof with such a coating is easy to handle and install. Temperatures at which it retains its properties - from minus 150 to plus 1200 degrees Celsius.
- Plastisol (PVC)
Plastizol 200 - metal roofing from polymer 200 microns thick. Differs in volume embossing, imitating the skin or bark of the tree. It was developed specifically for difficult climatic conditions, including industrial areas with a high level of environmental pollution.
Plastisol 100 is half the thickness and is used mainly indoors. It is also made with a coating on both sides and serves for the manufacture of weirs.
- Polydifluorite (PVDF, PVDF2)
Of all kinds metal tile coatings This is the most suitable for facades. It consists of a mixture of polyvinyl fluoride and acrylic in a 4: 1 ratio. Contains high quality pigments for imparting shine and color that is resistant to prolonged exposure to ultraviolet radiation.
The polymer is quite hard, has hydrophobic properties, which allows it to “repel” dirt, while being quite plastic. Can be both matte and glossy.Metal roofing can be shiny like metal. To this end, it is coated with varnish with the addition of a special dye. Resistant to atmospheric and corrosive effects.