Which materials are used for roof tiles


Roof tiles are made of different materials. Which common materials are used today for roof panels and sandwich panels, and which advantages and disadvantages they offer each, you can read in this article.

metal sheets

Trapezoidal sheets made of sheet steel are very common. Also for ladle and wave profiles in the roofing often steel sheet is used.

corrosion protection

In order to ensure appropriate weather protection, however, these sheets must be coated accordingly. Very high quality are polyester coatings. The underlying sheets are usually fully galvanized to provide additional protection against corrosion.

During installation, however, care must be taken to exclude as far as possible contact corrosion or crevice corrosion in terms of design. In spite of all coatings, the metal roof can corrode otherwise.

aluminum

Aluminum is also used for roofing panels and roofing panels as it is not prone to corrosion by nature. Particularly problematic, however, is the tendency to contact corrosion in connection with steel, since both metals have a very high potential difference. This must be considered constructively.

Aluminum is lighter than steel sheets, and this weight advantage can then be translated into a lighter roof construction. But the prices are much higher.

plastics

Many roof tiles are made of special plastics. Plastics have the advantage that they are completely corrosion-free, and can also be very tough and impact-resistant (depending on the type of plastic). They do not weather and rot, some types of plastic do not bleach even in the UV radiation.

Particularly interesting for the roofing is also GFK. This fiberglass reinforced plastic is also used in boat building and is particularly resistant, while extremely lightweight.

GRP roofs, which are also available in the ladle section, often have a basis weight of well below 5 kg per square meter. This enables very light roof constructions with at the same time a completely stable and permanent roofing.

Corrugated bitumen sheets

Bitumen corrugated sheets are generally used on smaller roofs. They are particularly cost-effective (as low as about 5 EUR per m²) and consist essentially of a fibrous material, which was impregnated with a special bitumen mass.

Durability and flexibility in laying also support bitumen corrugated sheets. They can be easily used on all roof pitches between 7° and 90°. The simple installation, they are even suitable for self-covering. The roof of the house but you should still rather a specialist to work to avoid mistakes in any case.

sandwich plates

Sandwich panels are made of different materials, but usually made of sheet steel. Between the two plates is an insulating material. Mineral wool is usually used here, which is non-flammable and highly heat-insulating.

Depending on the thickness of the mineral wool, U-values ​​of 0.23 W / (m²K) and 0.33 W / (m²K) can be achieved. Even without further insulation measures, sandwich panels already fulfill the values ​​required by the EnEV 2014.

Other materials

Roof tiles made of ytong or fiber cements are also common, and each have their own advantages and disadvantages.


Video Board: Indian women labourers make micro concrete roofing tiles in India