Decking is the most practical and cheapest material for roofing. It loses to many alternative solutions in terms of insulation and strength, but in some cases the use of metal sheets justifies itself. Especially if you use the technology of a folded self-latching roof with modified technical and operational qualities.
Material purpose
Due to the ease of installation, this type of roofing is widely used in private housing construction. Rebate sheets are laid over slopes on small roofs with complex turns and many technological holes with ledges. The layout of the segments makes it possible to carefully bypass the ventilation pipes and chimneys. Decorative properties also make self-locking seam roofing an acceptable design solution.historical building. Neutral in texture sheets with a matte polymer coating can be used in the reconstruction of old houses with metal roofs without changing the architectural appearance. The manufacturers of the material themselves recommend using it on slopes with an inclination angle of at least 15 degrees. Moreover, on steep roofs there are restrictions on laying heavy roofing like soft tiles.
Features of the use of self-locking sheets
From the side, the laid rebate is practically indistinguishable from ordinary corrugated board, if the latter also has a special textured treatment. However, in its design, this material differs significantly from conventional sheet steel. In the device of the elements of the seam roof, special corrugations are provided, which facilitate the technique of abutting installation. There are recumbent and standing lamellas, which together form a sealed surface that reliably insulates the roof. In this configuration of a seam roof with a self-locking seam lies the main technical feature. The long edges of the metal panels, oriented along the slope, are fastened with a standing seam, and horizontal - with a lying joint. The last seam is the closing one, but it can be further strengthened with additional fittings.
Types of material
As the main feature of the classification of the fold, the material of manufacture can be given, since such properties of the roof will depend on it,like bearing capacity, wind resistance, tensile strength and durability. To date, seam roofing made of the following metals is popular:
- Galvanized steel. Standard solution with good anti-corrosion properties and service life of about 30 years.
- Copper seam roofing. A self-latching seam made of copper stands out against the background of steel analogues with a noble natural texture, also does not support corrosion processes and, under favorable conditions, lasts up to 100 years. However, this metal is inferior to the same steel in terms of mechanical strength.
- Aluminum. Also not the best solution due to the structure that is malleable to deformations, but this is also its advantage, since repair work is facilitated in the form of replacing damaged segments.
- Zinc-titanium. A ductile and durable alloy, but also the most expensive and temperature demanding during installation.
Again, it is worth noting the importance of polymer coatings, which are used for almost all of the above types of fold, but can perform different functions. For example, when choosing a treatment composition, you can focus on increasing wear resistance, UV protection, frost resistance, or focus on the formation of an original design.
Installation of a self-locking seam roof
As the name implies, the lamellas are joined together without the use of special fasteners. Indeed, unlikeof many interlocking metal panels for the roof, the fold makes installation operations extremely easy thanks to the self-clamping mechanism. The structure is assembled by laying along the slope, after which each subsequent lamella is inserted into the groove of the corrugation and snapped into place. To fix the sheets of a self-latching seam roof between themselves, it is enough to press with your foot or softly hit with a mallet. And only after that, in order to fasten the formed cover to the supporting structure, the panels are fixed with self-tapping screws along a special side line (nail strip) with technological holes.
Technology reviews
The material is readily accepted by the consumer who appreciates ease of installation and structural functionality. The owners of such roofs also note the ease of maintenance and unpretentiousness in the care of this coating. The smooth surface does not retain dirt and is easy to clean and repair without the need to intrude into the rafter system. But many also note the unpleasant factors in the operation of a folded self-latching roof, which include a tendency to deformation and low thermal insulation. For example, in winter, it is hardly possible to do without a warming back substrate when it comes to a residential building. In addition, low noise insulation is also emphasized - moreover, in case of heavy rain, the roof itself will become a source of roar.
Conclusion
Due to the original mounting system and the overall design of folded lamellas, manufacturers managed to raise to a new leveloperational advantages of sheet metal roofing. On the other hand, a serious advantage in the form of price attractiveness has disappeared. So, the average estimate for a self-latching seam roof, taking into account the cost of material and installation, is 1000-1200 rubles/m2. Of course, you can meet 200-300 rubles if you use ordinary corrugated board as a blank and perform all installation operations with the fold yourself. But in this case, the quality of the coating may suffer, since the high geometric accuracy of each segment is important. Therefore, the best option is to use factory folded sheets and, on their basis, assemble according to the technology discussed above.
