What is better for the roof of metal or corrugated

Future homeowners in the construction process are often wondering what is the best metal tile or decking. It is good if they consult an experienced craftsman who can explain the difference between these materials will help to make the right choice. Independent search for an ideal roofing can lead to a dead end, since at first glance there is practically no difference between them. The metal tile and the professional flooring are made from one material, however possess absolutely different operational characteristics, and also are used in various situations. In this article we will talk about the advantages and disadvantages of metal roof coatings, compare their qualities.

Decking

Profiled sheeting is the material used to cover the roof, which is produced from alloy steel by cold stamping. For the manufacture of used sheet metal thickness of 0.5-1.2 mm. A special stamping machine on the surface of the corrugated profile squeezes the profile of various shapes. The shape, width, height of the waves depends on the type of material. The profiled surface increases the number of vertical stiffeners, due to which the profiled sheet acquires additional rigidity, strength, and resistance to mechanical stress. Manufacturers produce 3 types of professional sheet:

• Wall. Profiled wall type is used for the construction of fences, wall cladding, manufacture of formwork.
• Roofing. Roofing professional sheet is most often used for the device of the roof, as it has a low weight, high bearing capacity.
• Универсальный. Decking этого вида, благодаря точно рассчитанному количеству ребер жесткости, форме профиля, можно использовать в любых целях, он подходит для перекрытия крыши или обшивки стен, в зависимости от потребности строителя.

To protect against corrosion, the professional sheet is coated with a galvanic zinc layer, an alumino-zinc passivating alloy, or a pural polymeric film. This coating prevents the metal base of the material from coming into contact with water, preventing rust from forming. Manufacturers produce color and unpainted professional sheet, material without coloring is cheaper, however, it looks simpler, and it serves a lot less.

Note! Decking is made of thicker sheet steel than metal, so it is more durable, reliable and resistant to mechanical damage. However, the polymer coating layer of this material, on the contrary, is smaller, due to which it is more susceptible to corrosion.

Metal tile

Metal tile – относительно новый кровельный материал, который производят из листовой оцинкованной стали. Он имеет многослойное строение, включающее слой цинка, пассивирующее алюминиевое покрытие, толстую полимерную пленку из пурала, пластизола, полиэстера и защитный лак. Due to this composition, performance, degree of protection and service life of metal tiles are more than that of professional flooring. With the help of stamping, it is shaped like a classic ceramic tile. By experience, professional roofers metal has the following advantages:

• At observance of technology of installation and the correct maintenance of a roof from a metal tile serve longer, than a covering as a professional leaf.
• The metal tile coating has a high corrosion resistance, which is achieved due to the multi-layer structure and application of polymer protection.
• The metal tile looks much more presentable, more expensive and more esthetic, than professional sheet. Manufacturers offer an extensive palette, including both traditional roof colors and original.
• Due to the thick polymer protection that is applied to the surface of the material, the resonating ability of the metal tile is reduced. This reduces the noise in the roofing room during rain, wind and hail.

Important! High price, excellent performance and long life of the metal tiles are achieved through the use of multilayer protection. If the polymer film is damaged, the corrosion resistance of the material decreases sharply. Therefore, to cut and install metal tiles can only be cold, without using welding or grinders. Sections must be treated with a special primer for metal or paint.

In difference from a professional flooring, the metal tile can be mounted only on roofs with a bias more than 12 degrees. Because of the ridges located across the slope, this coating makes it difficult for snow, snowmelt and rainwater to come down from the surface of the roof structure.

The disadvantages of metallic coatings

Metal roof coatings are popular due to their light weight, aesthetic appearance, long service life and resistance to external influences. All these qualities are appreciated by roofers, since most of the territory of Russia is located in a zone with rather severe climatic conditions. However, decking or metal tiles made from the same material have common disadvantages:

1. High thermal conductivity. The metal base from which the profiled flooring and metal tile are made have a high thermal conductivity coefficient. Because of this, the lower surface is heated, the snow lying on the roof thaws and frost forms. When the snow melts, the ice crust scratches and damages the roofing material, causing corrosion. In addition, high thermal conductivity causes more heat loss occurring through the surface of the ramp. Therefore, all types of metal-coated roofs require thermal insulation.
2. Resonating ability. Metal-covered roofs are considered very noisy, as they resonate, increasing the sound of falling drops, hail or wind several times. In heavy showers noise can be heard in the attic, and even in visits to the previous floor. To solve this problem, you need to install noise insulation on the inner surface of the slope.
3. Abundant formation of condensate. Roofing metal is highly heated under the influence of sunlight, because of which condensate is abundantly formed in the under-roof space. It settles on the wooden elements of the rafter frame, which, with an increase in humidity, begin to rot. To prevent the destruction of the roofing structure, metal roofing and corrugated flooring are placed in conjunction with vapor barrier and waterproofing materials, as well as mounted exhaust ventilation.

Professional roofing masters note that with proper installation, the shortcomings of metal tiles and corrugated flooring will not become a problem. Compliance with the technology of installation, processing of wooden elements of the frame with antiseptic substances, the use of high-quality fasteners prolong the life of the roof with a metal coating, preventing the formation of condensate and corrosion.

Criterias of choice

A comparative analysis of the qualities of metal tiles and corrugated flooring did not reveal a winner, since both of these materials have useful advantages and use features that must be considered. With high-quality installation in compliance with technology, any of the coatings based on galvanized steel will last 25 years. To determine which material is better suited to specific conditions, use the following criteria:

• Цена. Decking стоит дешевле металлочерепицы, но имеет немного меньший срок эксплуатации. Премиальные марки профилированного листа по эксплуатационным характеристикам приближаются к металлочерепицы, но стоят примерно столько же.
• Уклон крыши. Decking используют, если уклон крыши больше 3-6 градусов, а металлочерепицу, если он больше 12 градусов. На более пологие скаты лучше укладывать профнастил, так как продольные желоба эффективно, быстро отводят воду с поверхности крыши, а поперечные волны металлочерепицы, наоборот, затрудняют этот процесс.
• Appearance. Metal tiles on the roof looks more impressive, advantageous than a straightforward, rustic profiled.
• Площадь ската. Decking выпускают в виде листов длиной до 12 м, что подходит для промышленных построек, крыша которых имеет большую площадь. В частном домостроении лучше использовать металлочерепицу.

The metal tile and professional flooring possess the big advantage - fire resistance. This quality allows the use of coatings on the basis of shaped metal for the construction of bath roofs, buildings with solid-fuel stoves or fireplaces, as well as for other rooms with a high risk of fire.

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