Preolitschindeln on old buildings

Preolit ​​shingles are a well-known building material in one part of Germany - but almost completely unknown in others. What properties these shingles have, and what you have to consider when you encounter them on an old building, read in this post.

Production method and properties of Preolit ​​shingles

Preolit ​​shingles are a special form of bitumen shingles. Older versions are similar to ordinary bitumen roof shingles, such as those on garden sheds, for example. In their modern design Preolit ​​shingles today often have an insert made of glass fiber fleece, which should make them more stable.

fire resistance

Roofs covered with bitumen shingles are considered hard roofs. They are not flammable and classified as "normally flammable" according to DIN 4102.

Likewise, they are protected by the DIN against flying fire and "radiant heat". Flying sparks are not sparks, but small pieces or burning flakes that can be whirled up and land on the roof. They can not harm a Preolit ​​roof.

laying

Preolitschindeln be laid as laying tracks, which contain between three and five finished punched roof shingles elements. They are glued with about a third offset (depending on the roof pitch).

But it is necessary to construct a cold roof (solid formwork) below the shingles. This also has some other advantages, such as the better thermal insulation of the roof.

Care must be taken to ensure that the roof is well ventilated and suitable for use with Preolit ​​shingles.

Appearance

The shape of the stamped shingles can be different. In the trade one finds the following forms:

  • triangular
  • rectangular
  • in beaver tail shape

Typical colors for Preolit ​​shingles are:

  • anthracite
  • Gray
  • green
  • reddish brown and autumn brown

distribution

Preolit ​​shingles have been very common in the former GDR, where they were a common form of roofing. Therefore, you will often find houses with Preolit ​​roofs in varying degrees of good condition, especially in the new federal states.

Old Stock

In the old stock, the state of the Preolit ​​shingles decides whether and how to rehabilitate. In the case of old houses with Preolit ​​roofing, the condition of the full formwork (moisture) should be checked in any case.

In advance, you should also be checked by a specialist, whether the existing rear ventilation of the roof is professional and sufficient. In many old buildings in the former GDR sufficient attention was not always paid to such building physics details by all hobby roofers.

Durability of Preolit

Bitumen roof shingles are generally considered a very durable alternative. The durability and weather resistance of bituminous roofing can also be seen in Norwegian homes. This is where ISOLA shingles are laid. They usually last for many decades.

In the US, where bitumen shingles are also a very common form of roofing, it is generally assumed that they last at least 30 years.

Tear off or renew?

If a technically correctly constructed bitumen roof with Preolit ​​shingles is present, it is usually not worth breaking off. It is not necessary with an intact substructure.

Renovation is simple and inexpensive, and the cost of Preolit ​​shingles is relatively low. As a rule, you can estimate between 5 and 10 EUR per square meter. Preolit ​​shingles can still be bought at most hardware stores.

In addition, it must be remembered that the substructure is designed for light Preolit-Schindel roofing (around 10 kg / m²), and for other covering materials such as clay roof tiles or concrete blocks a much more sustainable substructure would be necessary.

A higher durability than in bitumen roofing is thus usually not achieved. For the effort is certainly not worth it.

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