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Slate roof
Slate roof

Video: Slate roof

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Video: How to SLATE a roof - Set out a slate roof & bottom row 2023, February
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The slate roof has a long tradition with us and not without reason: it is easy to care for, extremely weather-resistant and enables many different types of decking. You can find out which slate roof is right for your home and why regular maintenance makes sense

Table of contents Table of contents slate roof: advantages, disadvantages and costs

  • What is a slate roof?
  • Advantages of a slate roof
  • Disadvantages of a slate roof
  • What colors are there?
  • Requirements for a slate roof
  • Diverse types of cover
  • Fastening slate slabs
  • Maintain slate roof
  • Clean slate roof
  • Cost of a slate roof

Table of contents Table of contents slate roof: advantages, disadvantages and costs

  • What is a slate roof?
  • Advantages of a slate roof
  • Disadvantages of a slate roof
  • What colors are there?
  • Requirements for a slate roof
  • Diverse types of cover
  • Fastening slate slabs
  • Maintain slate roof
  • Clean slate roof
  • Cost of a slate roof

What is a slate roof?

A slate roof is covered with slate. The natural material was created around 400 million years ago as a light deposit rock (metamorphic sedimentary rock). In the process, very fine-grained clay sludge was first solidified to claystone by pressure and then unfolded due to the formation of mountains. In this way, different types of slate were created, of which clay slate is particularly suitable as a material for roofing. In Germany, this clay slate is mainly extracted from surface and underground mining in the Rhenish Slate Mountains, in the Eifel, in the Sauerland and in Thuringia. However, the most popular is the slate roof in France: the neighboring country not only produces clay slate itself, but is also the largest buyer of Spanish slate.

Advantages of a slate roof

Schuppen-Deckung
Schuppen-Deckung

A slate roof covered with shed.

No matter how unique and unusual your roof surface is, slate is suitable for almost any type of roof covering. Because the individual panels are laid on top of each other like scales, so that they overlap on two sides and can even cover three-dimensional roof surfaces.

Slate is mined in the mine and, unlike other materials, hardly requires any reworking. This means that much less energy has to be used for the production. In addition, the raw material is a pure natural rock, contains no binders such as cement and is therefore ecologically harmless.

Due to its longevity of up to 100 years, the slate roof is still very popular today. Slate has a high degree of tightness and hardly becomes porous - an advantage when you consider the weather conditions that such a roof is exposed to in Europe.

If a panel breaks, it is sufficient to replace it - the renovation work is therefore limited.

Disadvantages of a slate roof

The material itself has no disadvantages. Merely the high purchase costs should not be underestimated when deciding on a slate roof. In addition, slate slabs should always be installed by a specialist - own work is then not necessary, but therefore no savings potential.

What colors are there?

Slate slabs are usually colored blue-gray. Colors like green, red, purple and reddish brown also exist, but are very rare in nature.

Requirements for a slate roof

So that you can cover your roof with slate at all, you should make sure that your roof has an incline of at least twelve degrees. In addition, full formwork of the roof is usually required, which means that you must first completely cover the roof with wood before you can equip it with slate slabs.

Rechteck-Doppeldeckung
Rechteck-Doppeldeckung

Rectangular double coverings use rectangular or square shaped slate slabs.

Photo: iStock / jamesforddesign

Diverse types of cover

Slate roof is not the same as slate roof. There are countless types of cover that make every roof something special. Here is a selection.

  • Universal coverage

    The universal cover is widespread and inexpensive. It is based on a square with a rounded corner and thus enables two different cover types: the left cover (from right to left) and the right cover (from left to right). Make sure that the container slope must be steeper if the roof pitch is low.

  • Rectangle double coverage

    With this type of covering, the third covering container covers the first by a prescribed amount in height. So there are three slates on top of each other in the height coverage. The slate stones are, as the name suggests, rectangular or square in shape and lined up orthogonally.

  • Dandruff cover

    The shed cover looks particularly beautiful and is still widely used today. When attaching the slate, scales of the same size are always used, which are prepared using templates.

  • Old German slate covering

    Old German slate cover is one of the most demanding types of cover. The slate slabs are not the same size, but are getting smaller towards the ridge. This makes the roof surface appear taller and slimmer. In this case, you should always leave the roof covering to a specialist with sufficient experience.

    Good to know: The costs for old German slate cover are much higher than for the other types of cover.

  • Wild cover

    Wild cover is also one of the more demanding types of cover. The craftsman has to adapt the slate individually to the conditions on site, there is no covering scheme for orientation. However, the following applies: large stones lie on the eaves edge and small stones on the ridge. For the wild covering, the roof should have a slope of at least 25 degrees. Otherwise there must be a waterproof sub-roof.

  • Decorative cover

    You get that certain something with a decorative cover. Common types of cover are supplemented with decorative cover - graphic patterns of all kinds are created.

Fastening slate slabs

Depending on the type of cover, there are different ways to attach the slate stones to the roof. Most often, however, slate nails or slate pencils are used. Occasionally, stainless steel slate screw pins, copper pins with roughened shank and hammer hook are also used. Suitable material is hot-dip galvanized copper or stainless steel.

Good to know: Rectangular covers are usually attached using stainless steel clips.

Klammerhaken
Klammerhaken

So-called clip hooks made of stainless steel are used for the rectangular covering.

Photo: iStock / minik

Maintain slate roof

Although slate roofs are long-lasting and weatherproof, they should be inspected every few years and checked for cracks or defects: they allow water to penetrate and can cause great damage to the house. A new slate roof should be inspected for the first time in two years.

Clean slate roof

Unlike other roofs, a slate roof is less prone to dirt. Nevertheless, there can be an overgrowth of algae, lichen and moss, which change the natural appearance of the slate and leave patina. Roofs on the weather side are most often affected. Home owners who are bothered by this can remove the green covering with a high-pressure system of up to 300 bar. Finally, a specialist can apply an antibacterial and fungicidal slate roofing product.

Cost of a slate roof

At first glance, the costs for a slate roof are very high. For a roof with an area of ​​150 square meters, you can expect around 70 euros per square meter with a simple type of cover. For comparison: clay bricks are available from 25 to 50 euros per square meter. But keep in mind that a slate roof has a particularly long service life and the costs will be amortized.

Lea Straub editors haus.de

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