Metal profiles for the roof - installation and installation

Metal roofs were one of the first truly durable and practical roofing coatings that were used for the construction of residential buildings. The disadvantages of roofing steel was considered only low corrosion resistance and carrying capacity. Modern materials based on this alloy have better characteristics compared to it, so the metal profile is very popular among developers. Convenient dimensions of the sheet facilitate the installation of the coating, and the affordable cost makes it possible to use it even in the conditions of a limited budget. In this article we will describe how to cover the roof with a metal profile so that it will serve for many years.

Varieties

Metal profiles for the roof - a practical roofing material, which is made of galvanized steel. It differs from the sheet metal used for the erection of a folded roof, which has a pronounced profile, which gives the coating additional rigidity and carrying capacity. The thickness of the sheet metal profile is 0.5-1.2 mm, and the dimensions may vary according to the customer. There are two types of this roofing:

• Decking. Deckingом называется кровельное покрытие из оцинкованной стали, которому в процессе производства придают трапециевидный или прямоугольный профиль. Высота профиля листа этого материала может варьироваться в пределах 1-10 см, от этого показателя зависит несущая способность и прочность профнастила. Монтаж профилированного стального листа выполняется методом на деревянную разреженную обрешетку. Стоимость этого материала меньше, чем металлочерепицы, однако, он обладает меньшим декоративным потенциалом.
• Metal tile. Metal tiles are called roofing material based on galvanized steel and a polymer coating, which has a wave-like profile imitating the shape of a classic tile. The thickness and profile of the sheet metal is less than that of corrugated board, however, visually it is a more attractive coating. Size and special lock allows you to do the installation of the cover with your own hands.

Note! The metal profile is suitable for roofs with slopes of at least 12 degrees. However, professional roofers and manufacturers of this practical material claim that a reliable metal coating can be made for a roof with a slope of 8-9 degrees provided that the joints are thoroughly waterproofed with a sealant.

Advantages and disadvantages

The roof of the metal profile is highly practical, so it is the most common design solution for low-rise residential and garden houses. In addition, profiled - a truly versatile building material with which you can cover the roof, sheathed walls or even build a garage. The advantages of the metal profile consider:

1. High strength. The strength of the profiled steel sheet is so high that it can withstand a 3-meter layer of snow, even with a highly sparse crate.
2. A light weight. The weight of a sheet of this material, depending on the thickness of the metal and the height of the profile, is 5-15 kg. A small mass allows you to mount the coating on a sparse crate.
3. Corrosion Resistance. Galvanized steel is inert to air, and therefore does not enter into oxidative reactions with it. More resistant to corrosion material helps to make a special coating of a resistant polymer.
4. Universal sizes. There is an opportunity to make sheets, the size of which corresponds to the length of the slope, in order to avoid during the installation of horizontal joints, reducing the waterproofing quality of the coating.
5. Fire resistance Galvanized steel is a non-combustible roofing material, so its installation can be performed even in buildings with an increased risk of fire.
6. Low weight Due to the fact that the metal profile weighs little, installation can be performed without strengthening the truss frame.

Consider that metal roofs have a high thermal conductivity and a resonating ability, so their installation is carried out in conjunction with an insulating material. In addition, the disadvantage of this type of roofing is a large amount of waste, due to the fact that the shape and size of the sheet require significant fitting during installation.

Roofing Cake

The roof of the metal profile has a complex, multi-layered structure, which gives it the necessary waterproofing, strength and thermal insulation qualities. Каждый слой конструкции улучшает качества и продлевает срок службы кровельного покрытия. Roofing Cake под металлопрофиль выглядит следующим образом:

• Crate. The crate is called a rarefied flooring made of edged boards or slats, fixed across the rafter feet, on which to attach the roofing material. For a profiled steel sheet, a sparse crate with a step of 60-100 cm is required.
• Thermal insulation. Thermal insulation is necessary to reduce the thermal conductivity of the material and sound insulation. It is necessary to fix insulation plates between the truss legs of the frame.
• Vapor barrier. Vapor barrier is called a special membrane that lets air through but does not let water molecules through. It serves as a protection for the frame of the roof and insulation from wetting and rotting. Steam insulation material is fixed on the underside of the rafters.
• Waterproofing. Waterproofing material protects rafters and insulation from atmospheric moisture. It must be fastened on top of the rafter using a construction stapler.
• Topcoat. The top layer of the roofing pie is metal or corrugated, which are overlapped with an overlap of 10-25 cm.

Important! Installation of the topcoat is performed using special roofing screws, which are supplied with special press washers made of rubber or latex. The washer when tightening the screw is deformed and closes the mounting hole with itself from the penetration of atmospheric moisture.

Design features

The size and bearing capacity of the sheet affects the step size of the batten for the metal profiles. And the amount of overlap between the roofing canvases is determined by the angle of inclination of the slopes:

1. On low-slope roofs with a slope of less than 12 degrees, the laying of the metal profile is performed with an overlap of 25 cm, subject to the mandatory sealing of the joints.
2. On low-slope roofs with a slope of 12-15 degrees overlap should be 20-25 cm.
3. On medium-sized roofs with a slope of 15-30 degrees overlap make 15-20 cm.
4. On steep-sloping roofs, where the angle of inclination of the slopes exceeds 30 degrees, the installation of the coating is performed with an overlap of 10-15 cm.

Experienced craftsmen say that the installation of the roof of metal "turnkey" without the cost of material is 1000-1500 rubles per square meter.

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