Metal today is the most popular roofing material among summer residents and owners of country houses. Its main advantages are low cost, long service life and attractive appearance. The dimensions of the metal roof tiles are standard, which makes it easy to calculate the quantities needed for roof sheathing of any configuration and sheet area.
general description
The metal tile has excellent operational characteristics due to its unusual structure. It is made of sheet steel 0.4-0.6 mm thick by cold stamping. From above, each sheet is first covered with a zinc layer, which provides reliable protection against water, and therefore, from rusting of the metal. Then a passivating layer is applied, and then a primer layer. At the final stage, the sheets are coated with a special polymer composition having color and texture. This layer not only protects the metal from adverse climatic and mechanical influences, but also gives the roof an aesthetic appeal and expressiveness. It was no coincidence that the metal tile got its name. From a distance, the roofing sheets of this species actually resemble expensive clay tiles.
Width
The dimensions of the metal roof tiles in the marking are required. The amount of material required for sheathing is selected, focusing primarily on the width of the sheets. At the same time, attention is paid not to the general, but to the useful. The latter is always smaller than the first, since the metal tile is laid on the roof lath with an overlap.
The full width of the metal tile sheet can be 1.16-1.19 m. The overlaps usually have a length of 0.06-0.08 m. The useful width of the metal tile sheets is usually 1.1 m. However, you can find sheets per 100 cm, 105, 118, etc.
Length
The sizes of metal roof tiles for this indicator can vary greatly. On sale there are sheets with a length of 80 to 800 cm. Therefore, if desired, you can easily pick up a material that is ideal for absolutely any roof. The length of the metal is always a multiple of 5.
When buying sheets for the roof, it should be borne in mind that the size of the overhang of the roof made of metal should not exceed 40 mm. Otherwise, the metal may subsequently bend or wrinkle. If the length of the slopes exceeds 7.5 m, the metal tile should be laid in two rows. The slope angle for this roofing material should not be less than 14 g.
Tile Thickness
Thus, what are the standard sizes of metal roof tiles, we have found out. Now let's see how thick this material can be. As already mentioned, steel 0.4-0.6 mm can be used for the manufacture of metal tiles. Also, the thickness of the material depends on the thickness of the polymer layer deposited on it. This indicator is usually 25-50 microns. Thus, the thickness of the sheets of metal can vary within a fairly wide range. The greatest demand among the owners of country houses is material at 0.5 or 0.45 mm.
Types of polymer coatings
The decorative protective layer of metal, thus, may have a different thickness. The following types of polymer coatings can be applied to the sheets:
Pural. This polymer is considered an excellent corrosion protection and can withstand temperatures from -15 to +200 gr. Of all types of polymer coatings, this is the thickest - 50 microns.
Polyester For people with average incomes, this is the most suitable metal tile (roof). The price per sheet (the sizes of this type of material may be different), covered with such a layer, is the lowest. However, it has a smaller thickness than sheets coated with pural - 25 microns. A metal tile with such a protective layer can be mounted on the roofs of houses built in regions with a normal climate without extreme temperatures. Today on sale you can find such sheets of a slightly different variety - coated with polyester in combination with teflon. The polymer layer of this type is more resistant to various kinds of mechanical damage. The thickness of the Teflon-polyester coating is 35 microns.
Polydifluoride. This is the most expensive type of polymer coating. Its advantages are primarily attributed to high resistance to burnout. Therefore, sheets with such protection are most suitable for covering the roofs of houses in southern hot regions. The advantages of polydifluoride are resistance to mechanical damage and a very long service life. The thickness of the PVDF layer is 27 ฮผm.
Plastisol. Sheets of metal with a coating of this type are on sale quite rarely. The fact is that the polyvinyl chloride used to make plastisol is considered environmentally not too safe. The metal tile of this type enjoys certain popularity only due to the fact that this polymer is characterized by increased strength and lasts a very long time. The thickness of plastisol is 200 microns.
The cost of metal, depending on the type of coating, can vary between 150-250 r. per square meter (for 2015).
Profile height
Roofing metal tiles, the standard sizes of which are very convenient, can vary in wave height. The value of this indicator depends primarily on the geometry of the profile, which may be different. The most popular waveforms of metal are:
Monterrey This is the most common variety. A profile of this type imitates clay tiles. The wave height of such sheets is usually 39 mm. Supermonterrey sheets are also available. For this material, the wave is slightly higher - 46 mm.
Cascade. This type of metal tile is somewhat reminiscent of a chocolate bar. The height of her profile is 25 mm. This is a very beautiful variety, but at the same time quite expensive. Brown sheets of cascade look especially impressive.
Dune. The advantages of this variety primarily include the ability to use hidden fasteners. On the roof, this material looks very solid and, compared with other types, quite original. In the metal tile of this variety, the wave height indicator is 46.5 mm.
Metal for complex roofs
To broken roof today you can order a full set of sheets with accessories. To do this, call an employee from a company specializing in the supply of this material. A professional will inspect the roof with placing an order. At the same time, such parameters as configuration complexity, features of the rafter system and roof dimensions will be taken into account. A metal tile (and components for it in case of a specialistโs call will not have to be searched - which is very convenient) - the roof in installation is very simple. However, installing it on sloping roofs of an unusual configuration for people without experience can still cause certain difficulties. Companies specializing in the supply of metal, usually provide services for its installation. Therefore, in this case, it is worth thinking about paying for the installation of sheets.
Than to cut
Manufacturers select the dimensions of the metal tile for the roof so that it is as convenient as possible in laying. This material is practically not needed for cutting during installation on the roof. However, sometimes you still have to cut it. Before performing this operation, you need to decide on the choice of tool. The fact is that the upper polymer layer of the sheets is very easily damaged. Therefore, for example, you can not cut them with a grinder in any case. This tool heats the work surface too much. In addition, sparks fly from under the circle when cutting metal, which also damage the polymer layer. Metal tiles are usually cut with electric scissors. You can also use a jigsaw or drill with a cricket tip.
Cutting rules
Thus, it is necessary to cut the material correctly, whatever the size of the metal tile. For a roof (the price of this material depends primarily on its length), sheets of complex configuration sometimes have to be cut both in length and in width. In the second case, when cutting, among other things, you should pay attention to the direction of the profile. Each sheet of metal has a top and bottom. The material cannot be turned over during installation.
The length of the metal tile can not be cut at every point. So, for example, the cut line should in no case pass along the region of the wave difference. If the cutting is not carried out correctly, the sheet in the following simply cannot be installed on the roof, since it will deform.
The sizes of standard metal tiles (length, thickness, width) are convenient for laying on any type of roof. This, combined with the cheapness and relative simplicity of cutting, makes the material so popular. To choose the most suitable metal tile in one case or another is completely simple. In extreme cases, it will be possible to turn to specialists who will make accurate measurements.