What is metal shingles
Essentially it is a profiled galvanized steel sheet that has a colored polymer protective coating. In Finland, manufacturers use 0.5 mm thick steel sheet, which is galvanized and covered with a passivating layer, primer and outer layer of polymer coating. This technology provides high quality because the passivating layer protects galvanizing from the destructive effects of chemicals contained in the primer. It is necessary to improve adhesion with external polymer coating. In this capacity, the Finns use pural, matte, and plain polyester. The protective qualities of these coatings are different, which is reflected on the price of metal shingles. To date, judging by reviews on forums on the Internet, primacy in combination of price and quality belongs to polymer coating of purals.
External coating largely determines the life of this roofing material, which withstands quite severe mechanical loads and destroys the atmospheric effect. For example, pural, polyurethane based polymer, is characterized by high mechanical resistance and insensitivity to direct sunlight and ultraviolet, it does not burn out and is capable of withstand significant temperature differences.
What depends on the quality of metal tiles
Although this roofing material is most often called “Finnish”, it is not always true. Today, when metal shingles are produced in many countries of the world, few manufacturers independently paint and roll metal — for this purpose there are related production, which may be located in other countries.$ Thus, for example, the Finnish company “Rukki” has built a plant in Ukraine for the production of metal tiles and supplies it with raw materials, and the coloring of the products is made in Luhansk. Russian companies most often use sheet metal of Novolipetsk Metallurgical Combine for the production of metal tiles, so sometimes you can hear such name — “Lipetsk” metal shingles.”
Not all manufacturers accurately observe the manufacturing technology and approved GOSTs, which, of course, affects the quality of metal tiles. For example, some Swedish and domestic companies offer rental products with a thickness of only 0.4 mm, making their products quite vulnerable to installation work. However, exceeding the standard of 0.5 mm is also not the best solution – in this case the rental is characterized by increased rigidity, which creates additional difficulties in its processing and leads to distortion of the geometry profiled sheets. This subsequently manifests itself as visible joints and a violation of the overall integrity of the roofing. The
roof covered with metal tiles must necessarily have a grounding which is attached to a zipper mesh.
As can be seen from the above, the quality of the material you will cover the roof of your home directly depends on the manufacturer. Therefore, before buying it will be unnecessary to read reviews on forums on the Internet about those import and Russian brands, which the construction market offers today, and only then to turn to the tested producers that have proven themselves only on the good side. Those companies that allow disruption of technology, as well as errors of installation and stacking, have largely caused some myths about Finnish metal tiles that do not correspond to actuality.
Truth and fictions about Finnish metal tiles There
is a view that really high-quality Finnish metal tiles produced in Finland are very expensive. Yes, its cost is slightly more expensive than that made by domestic companies from metal produced in Lipetsk, but considering factors such as durability, resistance to external influences, and also the cost of repairing and restoring the protective coating, as a result it will cost you much less than low-quality and inexpensive material.
When buying Finnish metal tiles, ask the seller certificates confirming its quality. They should also provide basic technical and operational characteristics.
is thought to be too much waste left when stacking metal shingles. Of course, it will be if you buy shingles on the construction market, counting the amount of necessary material “per peephole”. In order not to spend extra money and, in addition, significantly facilitate the installation process, it is necessary to order metal tiles from those suppliers who will prepare you the necessary kit, guided by submitted by the roofing project.
Occasionally, raindrops can be heard making a strong noise, knocking a drumbeat across the roof out of metal shingles. This can be attributed to installation defects when the recommended distances between the anchorages were not sustained, for the same reason water may flow between the sheets.