Galvanized iron roofing is quite a popular building material, which has been used for a very long time. The technical and operational characteristics of iron are quite high: refractory, has an excellent appearance due to the shiny surface, and is durable. Due to its light weight, the use of iron as a roof can significantly reduce the load on the rafter system and the walls of the building. Thus, it is possible to significantly reduce construction costs.
It should also be noted that the processing and installation of metal is quite simple, this allows you to speed up the process of blood erection.
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Iron galvanized or black?
A couple of years ago, black iron was most often used for finishing the roof. However, this material is not the highest performance. It has a short service life, it must be constantly treated with protective substances and painted.
Today, iron has been replaced by galvanized roofing steel. This material occupies a leading position in the market of building materials.
You need to know that the galvanized roofing steel GOST 17714 - 72 is iron, treated in a special way. As a result of processing, iron is obtained from steel, which is intended for roofing, the manufacture of dishes and other household utensils. They release it either in rolls or in sheets. The latter option is more convenient for the transportation process, as it does not require special heavy trucks.
There are certain standards for roofing iron. The thickness of the sheet can vary from 0.35 to 10 mm. Sheet sizes are approximately as follows:
- width is from 510 to 1000 mm;
- lengths from 710 to 2000 mm.
These parameters are varied by the State Standard under the number 8074 - 82. The necessity to control the processing of the surface of the metal sheet is also indicated there. It should remain smooth and even. During the production process, the material should be checked for roughness and voids, as well as cracks, bubbles and sunsets. If any damage goes unnoticed, and metal sheets of such poor quality are installed as a roof, this can lead to leaks and destruction of the structure.
What is galvanized steel?
In fact, these are thin sheets of ordinary steel, which are coated on both sides with a layer of zinc. In this case, the zinc layer should be at least 0.2 mm, while the total thickness of the galvanized metal sheet is usually not less than 0.3 mm.
Please note that high-quality roofing steel, galvanized or not galvanized, must be perfectly smooth and smooth on both sides, without rust, stains, stains. You should also pay attention to the quality of the zinc layer. It should not be without sag. In addition to sagging, places not covered by zinc may remain. As you understand, roofing material with similar integrity violations is not suitable for use. The bottom line is that the zinc coating is designed to protect the steel sheet from rust, corrosion. High-quality zinc coating can significantly increase the operational life of the roof, possibly even a few tens of years.In the case of inflows, of course, the technical characteristics of the material will not suffer too much, but its decorative qualities will significantly deteriorate.
Basic steel roofing materials
Currently, several types of steel material are available for roofing at once. The main ones are: metal tile, sheet steel and corrugated board.
The use of galvanized steel for roofing involves the construction of a fold roof. This requires a lot of labor costs. Special tools and equipment are needed. After installation, the roofing sheet may be painted. This will affect the duration of its operation, as well as give a beautiful appearance.
Corrugated roofing iron, otherwise corrugated board, is especially popular. There are a number of reasons for this. This is the most durable and durable metal roofing material. Thanks to careful processing and several protective layers, corrugated board is resistant to moisture, temperature extremes, .. exposure to sunlight. Corrugated roofing iron is produced by rolling steel sheets under the pressure of a special rolling machine. There, under fairly high pressure, profiles of a certain size are formed on the sheet: height and width. Profiles come in various shapes: in the form of sinusoids, trapezoids, rectangles, and so on. As a result, due to the acquired stiffening ribs, which are the profiles, the steel sheet acquires additional rigidity and strength.
You should be aware that if the profiled steel sheet is damaged, the places of scratches and cuts must be treated with an antiseptic and coated with paint. Paint is easy to match. If you do not timely treat the damaged surface, in this place, subsequently, rust or fungus forms, which can also go to the roof truss system.
Due to the development of technology, as well as the desire of manufacturers to conquer the market of roofing materials, roofing iron with a polymer coating is currently being produced. This type of material has a large color palette. Thus, it is not difficult to make a choice in favor of one or another option, taking into account the general architectural concept of the building. In addition to the decorative function, the polymer coating plays an important protective role against corrosion and rust.
Thus, the profiled sheet is one of the most popular materials with fairly high technical characteristics. At the same time, when choosing a professional flooring, in addition to high quality, it is worth paying attention to the composition of the material, the thickness of the layers and protective coatings. It is necessary to choose the material that best suits your ideas and quality requirements.
Metal in appearance and technical characteristics is not too different from corrugated steel. The main difference is the profile shape. In the given case profile imitate natural ceramic tiles. Accordingly, the metal tile is somewhat more expensive than corrugated board. But it is worth paying for such an attractive appearance of the roof. Decorative characteristics of metal tiles significantly benefit.
Work with steel
Galvanized roofing steel GOST 17714 - 72 requires careful handling. Please note that the polymer coating is quite easy to scratch, especially with the edges of another sheet of metal. As a rule, in production, each sheet is packed in a plastic film for safe transportation. It should be removed immediately before installation. Also, before starting roofing, you should order a loader machine that will feed the sheets. This will greatly facilitate and reduce the work.
Also, remember that any work with steel should be carried out with gloves, since the edges of the sheet are very easy to cut.
Since in the process of erecting the roof it is not uncommon to cut steel sheets, adjusting them to size, the thread must be carried out in safety glasses.
It is important to remember that the carving of metal sheets with a grinder is strictly prohibited! This can lead to destruction of the edge of the steel sheet.
As a rule, special manual or automatic scissors for metal are used for these purposes. It is also necessary to paint the places of cuts with paint in order to avoid the occurrence of corrosion in the future.
Today, a metal roof is quite popular. The reason is high quality, long service life and the possibility of choosing textures and color schemes. However, when working with metal, certain rules must be followed. This will help extend its longevity and save you from unnecessary trouble in the future.
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