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Asbestos cement sheet: advantages and disadvantages, scope

The asbestos cement sheet, better known as slate, has not lost its fame for a unique building material for many decades, and has been successfully applied in modern construction.

Application area

Slate sheets for today are made in two versions - wave and flat.

But if the profile wavy sheet is used only as a roof covering, then the flat one finds a much wider application.

It is used in the construction of residential buildings, as well as administrative and industrial facilities. Asbestos cement flat sheet in this case is used as a fixed foundation for foundation, used to construct unloaded partitions in the building, as one of the components of a flat roof pie, dry screed for floors or as a fencing of balconies and loggias.

In the production of sandwich panels, slate is a facing component.

In agriculture, it is used to erect fences, pens for livestock, cells on poultry farms.

Types of asbestos cement sheets

Slate is a mixture, which includes asbestos fiber, Portland cement and water. Distributing evenly in the total mass of the composition, it is asbestos that creates a reinforcing base, imparting impact strength and tensile strength to the sheets.

Depending on the production technology, the asbestos cement sheet is produced unpressed and pressed. The pressing method makes it possible to significantly improve its performance characteristics, thereby increasing strength and reducing porosity.

Since the non-pressed slate has a lower strength and a 2-fold less thawing-freezing cycle than its pressed analogue, it is applied only inside buildings.

Both types of slate are not very expensive, and the unpressed asbestos cement sheet is much cheaper.

Advantages and disadvantages

This building material is not accidentally in high demand. It is distinguished by high technical characteristics, the main of which are:

  • Frost resistance and ability to tolerate temperature changes well;
  • No deformation when heated;
  • High strength;
  • Good sound insulation;
  • Indifference to ultraviolet;
  • High fire safety;
  • The ability not to accumulate static electricity and not to shield electromagnetic fields;
  • High anticorrosive properties;
  • Resistance to rot and mold;
  • Ease of processing and ease of installation;
  • durability.

Such properties have all kinds of slate. Along with this, the flat pressed asbestos cement sheet has even better qualities:

  • Double the ability to withstand temperature changes;
  • Higher safety margin;
  • Very low porosity.

Due to the latter property, its water absorption decreases, and the sheet successfully resists the appearance of moss on its surface.

Durability in 30 years, which is inherent in non-pressed slate, increases to 40-45 years.

One of the main disadvantages is the relative fragility of the sheets, which requires increased attention during transportation and installation.

In addition, they include:

  • The weight of the sheets, which does not allow them to be laid alone;
  • The need for cutting tools to cover sections with special compositions;
  • Tendency (over time) to the appearance of moss.

Required protection

To increase the service life and maintain the performance characteristics, all types of slate need additional color. Thanks to this, over time, the sheets practically do not collapse, the emission of asbestos particles in the air decreases, the water absorption level decreases, which increases the frost resistance, and also creates a barrier to the growth of lichens and mosses.

The asbestos cement sheet (slate) is treated with special acrylic paints. They not only create a protective film on its surface, due to which the service life is doubled, but also gives it an aesthetic appearance.

Mounting Features

Before starting to lay slate on the roof or to make the walls, it is necessary to purchase a respirator. It will prevent dust from entering the respiratory tract, which is formed when cutting the sheets.

Also, you should know that all sections must be immediately treated with acrylic paint.

Before starting the installation, the asbestos cement sheets are scanned, sorting the broken sheets and those that have chips.

The nails used for fixing the sheets must be provided with a galvanized hat and a rubber washer. Immediately scoring them is impossible. First, in the slate, you need to drill holes for them, then gently with the hammer begin the process of fastening.

In the process of laying, so as not to damage the sheets, you can not walk on them. To move, you need to use special ladders or bridges.

If you adhere to the above recommendations, the installation of asbestos cement sheets will be much easier. We hope, our advice will be useful to you.

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