Any developer will agree that the choice of roofing material is a responsible matter, it must be approached theoretically and practically. Moreover, the huge selection on the market is confusing. In our article, we will introduce the most popular material - the Finnish pural metal tile. Let's talk about its advantages and disadvantages.
The roof is an important structural element of any building. Roofing from a metal tile residential building - its reliable protection from all kinds of negative effects of climatic, weather, natural.
When choosing a material for a roof, it is so important to consider that it will subsequently be able to withstand these loads with dignity and last a maximum period.
It is recommended to use this type of roofing in conditions with a non-aggressive or slightly aggressive degree of environmental impact at an air temperature of minus 50 to 50 °C (Footnote 1).
The beautiful design of the roof is also important, as it is the logical conclusion of the image of the entire building.
For more than 10 years, Finnish pural metal tiles have been sold on the Russian market. It is now an established brand.
The Finns, knowing the peculiarities of the Russian climate, aimed their production at its peculiarities.
And they did not fail: at present, Finnish products are the most in demand and are in high demand, both among sellers and buyers.
Such a high popularity and demand is explained quite simply: over the years of operation, this roofing had no complaints.
A number of advantages favorably distinguish Finnish products on the Russian market: no other roofing has such excellent characteristics.
Features of the Finnish metal tile
Roofing Pural was first developed in 1999 by the Finnish concern Ruukki. Such a metal tile is produced from galvanized sheet steel, with a thickness of 0.4 to 0.5 mm.
The basis is polyurethane, which is modified with polyamide. The metal tile (due to the pural coating) has a marketable and high-quality appearance, has excellent decorative properties.
Manufacturers issue a guarantee for the operation of the Pural coating for at least 15 years, without changing the quality and decorative characteristics. Such a roof will not show any corrosion, fading, leakage.
Pural metal tile has the following composition:
- Steel sheet.
- Zinc coating (minimum 275 g/m).
- Anti-corrosion coating.
- Primer.
- Coating polymer pural.
- Protective varnish.
Below is a table (Footnote 2) Structure of a metal tile sheet coated with Pural® or Pural Matt®
| Characteristics | Polyester coating | Pural coating | Pural Matt® finish |
| Nominal Coating Thickness (µm) | 25 | 50 | 50 |
| Coating on front side (µm) | 19 | 30 | 30 |
| Primer (µm) | 6 | 20 | 20 |
| Texture | smooth | low structure | structural |
| Gloss, Gardner 60° | 30‑40 | 34‑46 | — |
| Max operating temperature C° | 100 | 100 | 100 |
| Min operating temperature С° | -60 | -60 | -60 |
| UV resistance | RUV 2 | UV⁴ | UV⁴ |
| Corrosion resistance class | RC 3 | RC5 | RC5 |
| Scratch resistance | ≥2000g | ≥4000g | ≥4000g |
| Fade resistance | Moderate | very high | very high |
The main qualities of pural coated metal tiles
- The resistance to mechanical stress is high. Thanks to the pural coating, which is 50 microns thick, the metal tile perfectly withstands molding. At the same time, its qualitative features do not change.
- Galvanized steel with pural polymer perfectly lends itself to profiling and folding. Moreover, the coating is not damaged at all.
- Possesses the increased resistance to any mechanical influences (scratches, blows, etc.).
- High resistance to ultraviolet rays. The coating does not change its color even after many years of operation.
- High resistance to atmospheric aggressive factors (strong winds, hail, snow, acid rain).
- This coating is heat-resistant and adequately withstands temperature changes, much better than polyester. It has excellent anti-corrosion performance.
- Longevity. Roofing made of metal tiles will last 40 years or more. No repairs, no roof leaks.
- Environmental friendliness.
- Fine decorative qualities to a metal tile are given by special pigments of high quality which are a part of a covering pural. Thanks to them, the coating also has high dirt-repellent properties and high ductility.
The main disadvantages of pural coated metal tiles
- If the calculations are wrong, perhaps 40% of metal tiles waste.
- With a sharp change in ambient temperature, condensation may form.
- The color scheme is not as diverse as other coatings.
- During precipitation, it creates increased noise. Many experts do not agree with this opinion: with proper installation, metal roofing does not create any noise. Such troubles occur when the sheets are not properly installed and fastened.
Operating conditions of metal tiles with pural coating
Important to know: pural coated metal tiles are indispensable in those climatic zones where there are special requirements for weather resistance. It withstands a fairly wide temperature range: from -60From to +120WITH.
Installation do-it-yourself metal roofing can be produced even at sub-zero temperatures down to -15WITH.
A little advice: correctly calculate the required amount of metal tiles and purchase it from one seller. Since, even despite the marking, there may be differences in the shades of different production batches.This is fraught with the fact that the coating on the roof looks uneven and not very aesthetically pleasing.
Offers of the roofing materials market
A word of advice: many sellers present Pur-coated metal tiles as Finnish products. In fact, this is a Swedish product that has significant differences from the pural coating. The Pur coating is based on polyester, has an unstable coating thickness (41-48 microns), its minimum processing temperature is only -5C. As you can see, the quality indicators of the Pur coating of the Swedish concern SSAB are much lower than those of Finnish products.
Not only the Finnish manufacturer's pural metal tile is represented on the Russian market, there are others that produce pural or its analogues. The most popular of them:
- grand line
- Takotta
- MetalProfile
Be careful when buying.
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