Construction of houses

What to choose: metal or corrugated board

Spring is the time when active construction and repair work begins, especially in the summer cottage and cottage sector. Any construction site requires preliminary preparation and accurate calculations. Now is the time when it is necessary to assess the upcoming work, calculate the time and required materials. This advice is especially relevant in relation to the arrangement of the roof, since, as you know, the foundation is the key to the strength and durability of the structure, and the roof is the key to comfort and warmth inside the house. In the article we will consider what to choose: metal or corrugated board.

Content:

The range of roofing materials is unusually wide, however, in order to figure out which material is suitable for a specific task, it is not at all necessary to be a professional in construction..

All roofs are divided into:

  • soft;
  • solid.

When it comes to building a private house, then a solid material will be preferable for a typical pitched roof. Recently, metal tiles and corrugated board have become one of the most popular in this section. Let’s consider each of them in more detail.

Metal tile

In the 1960s, a new type of metal roof was developed in Finland, which immediately became widespread in Europe due to its excellent performance and ease of installation..

In Russia, metal tiles appeared in 1990, and since then their sales have only grown. And according to statistics, at the moment about 70% of our compatriots choose it as a roofing material for their home..

The structure of the metal tile

The metal tile is a durable sheet of steel that is galvanized and coated on both sides with several layers of polymer coating. The material gets its shape, reminiscent of natural tiles, after transverse stamping.

The structure of the metal tile:

  • At the base of a sheet of metal tile lies a steel sheet with a thickness of 0.4 – 0.6 mm. It is subjected to galvanizing (zinc or aluzinc), as well as passivation, which not only effectively protects against corrosion, but also prolongs the life of the metal.
  • Then the sheet is primed and covered with a layer of polymeric material. It can be pural, plastisol, polyester or matt polyester. Any of these materials provide protection against ultraviolet radiation, corrosion, chemical and mechanical influences, the difference in their use is only in small details. For example:

In the table, the characteristics of the coatings are presented in a more visual form to make it easier to compare them..

Advantages and disadvantages

The main advantage of a metal roof is, of course, its beauty. Manufacturers offer a wide range of materials in various shapes and colors. From an aesthetic point of view, this material outperforms corrugated board, metal roofing looks very representative.

Also, the advantages include:

  • simple installation of metal tiles;

  • availability of all necessary components for installation in the delivery set;
  • the ability to accurately select the size of the coating according to the size of the roof, as well as take into account all the necessary technological openings and select additional elements for them.
  • suitable for use on any roofs, including those with complex geometries;
  • the material has a high degree of fire safety NG (does not burn);
  • wide color palette.

Disadvantages:

  • large weight (including due to the laying technology: overlaps, additional elements). The material gives a significant load on the rafters, on the roof structure as a whole, on the walls and, accordingly, on the foundation. Therefore, the decision on the choice of material must be done in advance, at the design stage, so that all loads are correctly calculated;
  • the possibility of corrosion. Despite the high-tech processing, the material is still based on metal, any inaccuracy in installation or carelessness in transportation can lead to surface damage and, accordingly, to the appearance of rust in the future..

  • when installing a roof, it is also necessary to conduct an analysis of external environmental factors in advance:
  • the price of metal tiles (since the comparison is made with corrugated board, the price here is disadvantageous).

Advice: metal tiles are quite complex material in terms of laying technology. It makes sense to entrust this process to professionals. As for the purchase, it is also worth paying attention to official dealers, giving preference to those firms that not only sell it, but as a free bonus make a complete roof project, calculate the loads and the required amount of material and additional elements. In this case, unpleasant surprises will not arise already during construction..

Myths about metal tiles

A few popular misconceptions about metal roofing.

  • Metal tiles are very noisy in rain and wind. Yes, you need to understand that a metal roof has a significantly higher sound conductivity than, for example, a soft roof. However, if we talk about a residential roof, then, firstly, the correct high-quality installation ensures the lowest possible noise level. And secondly, the roofing cake, which includes a layer of sound insulation, will significantly reduce noise..
  • The metal tile attracts lightning, it definitely needs lightning protection. Lightning protection is installed on any type of roof, whether it is metal or Ondulin. In addition, metal sheets are covered with a layer of polymers, which are an insulating material, and do not have guaranteed contact with each other..

  • Snow comes down from metal tiles in avalanches. If the roof is pitched, then snow will melt from any of its types. To ensure safety, snow guards are installed on any roof.
  • The polymer coating peels off like a film. If the metal tile was purchased from an authorized dealer, produced by a well-known brand, then, firstly, it will be given a guarantee of at least 10 years (although it lasts several times longer), and secondly, the coating made at the factory itself is not damaged. Only if it is handicraft or fake.
  • Thus, we can conclude that if you do not chase a penny economy, but make a good project, calculate all the materials and buy high-quality metal tiles, then the roof will delight for many years.

Metal tile photo

Corrugated board

It is a versatile building material used not only for roofing, but also for fences and walls..

Advice: in order not to make a mistake when choosing, you need to check the marking. Roofing corrugated board is designated by the letters “K” or “PC”.

The structure of the corrugated board

A modern profiled sheet consists of several layers that provide it with excellent performance characteristics, including protection against aggressive external factors and corrosion.

Manufacturers offer an unusually wide selection of materials with different corrugation heights (8 – 45 mm) and sheet width (1000 – 1200 mm).

Advice: the larger the roof area and the smaller the slope, the higher the corrugation of the profiled sheet should be, optimally from 30 mm.

Decking is very popular, which is not surprising, because people always strive for the ideal price / quality ratio, which this building material perfectly meets:

  • its service life is about 30-40 years;
  • in addition, it allows you to work with it independently, without involving construction specialists;
  • and if you pick up a sheet according to the size of the roof slope, then installation will be elementary – just fix it on the rafters.

Advantages and disadvantages

The main advantages of corrugated board are:

  • relatively low price of corrugated board;
  • light weight. This factor not only facilitates the transportation of the material and working with it, but also does not have a strong effect on the floors of the house and the foundation, and therefore makes the entire project of the house cheaper;
  • has a high fire safety class NG (does not burn);
  • high strength of corrugated board. If a sheet with a thickness of more than 0.7 mm is used for installation, then you can move along it (with the only caveat – only in soft shoes);

  • wide range of sizes;
  • due to the great demand, it will not be difficult to buy corrugated board of the desired color in any construction market.

The main disadvantage of corrugated board is the possibility of corrosion:

  • small scratches may appear when laying the material. Rust spots also appear at the point where the sheets are attached to the rafters. Therefore, after the completion of the installation work, the entire surface of the roof is checked and tinted in those places where scratches or other damage to the surface have appeared..

Useful Tips

  • Before buying corrugated board, you need to make accurate measurements of the roof. It is best to select sheets of corrugated board in such a way that its width is equal to the length of the roof slope, this will greatly simplify installation and give an additional guarantee of waterproofing. Plus, you don’t have to cut the material.
  • Speaking of cutting the profiled sheet, it can only be done with a reciprocating saw or slotted shears. The popular “grinder” generates a lot of sparks, which, falling on the corrugated board, destroy the upper paintwork, which further leads to corrosion. Self-cutting – the risk of rust formation at the cut points, therefore it is so important to correctly calculate and select the material, since at the factory all edges are processed and painted over.

  • When fixing the corrugated board, you should not use nails. This increases the risk of corrosion, and there is also a risk of material tearing at the attachment point in strong winds. In addition, nails do not provide a tight fit to the rafters, and therefore, there is no waterproofing. It is better to use self-tapping screws as fasteners, which are screwed with a screwdriver or drill at the lowest speed. 2-3 months after laying the roof, the self-tapping screws in the attachment points may loosen, they need to be tightened.

Decking photo

Conclusion

Metal tile and corrugated board are materials that are very similar in their characteristics. The decision to use one of them is made after solving the following issues:

  • Will the roofing work be done independently??
  • Is the aesthetic moment important?
  • Is there a need to save?

Based on the answers received, you can clearly understand whether to choose corrugated board for the roof or metal tiles.