Jump to main content Jump to navigation Jump to footer

Technical documentation and brochures

Here you will find our complete documents such as EAM maintenance instructions, installation instructions, product data sheets, brochures and more. If you are missing something, you can always contact us and we will fill up this resource center.

Product datasheet

Light Oppdal quartzite is a medium-grained gneiss-mica slate that is a variant of quartzite schist. Otta Pillarguri is a dark charcoal phyllite rock. Offerdal quartzite is a feldspar metasandstone quartzite.

In the product data sheets you will find technical specifications, test results and mineralogy.

EAM (Enterprise Asset Management)

When you choose Scandinavian slate, you’re not just choosing a beautiful and environmentally friendly material, but also an almost maintenance-free product that will last for many generations and hundreds of years, irrespective of temperature, weather and climate. As long as the slate is laid in the right way, maintenance will more or less be limited to keeping it clean.

Our Environmental Product Declarations (EPDs)

Minera Skifer was the first company in Norway to gain an EPD® for natural stone.

EPD stands for “Environmental Product Declaration” and presents objectively quantified environmental information to document the slate’s total emissions during its entire life cycle. An EDP is prepared in accordance with the “International Organization for Standardization 14025” and makes it possible to compare apparently different products in terms of their impact on, for example, the ozone layer, contribution to global warming, energy consumption and fossil fuel emissions. Read more about EPD, environmental impact and sustainability.

Our slate from Oppdal and Offerdal has an extremely low environmental impact compared to other products and building materials in general.

ECOproduct certificates

The certificate from ECOproduct is valid documentation for use in e.g. BREEAM-NOR projects.

ECOproduct assesses the actual environmental properties of construction products based on a third-party verified environmental declaration (EPD), and gives you the opportunity to choose the most environmentally friendly construction products on the market. ECOproduct evaluates the product according to six environmental areas, each of which is rated.

ECOproduct is used by architects, contractors and builders with the goal of making the right material choices in the construction process, documenting environmental properties and achieving points in environmental certifications of buildings. Recognized, international standards and references are used as a basis for the assessment, in addition to the current Norwegian government requirements.



Installation guide

Slate is an extremely versatile natural material that can be shaped and worked for use in everything from roofs to bathroom tiles. In addition to the installation guide below, we also have a number of instructional videos and guides from the Minera School of Slate for shaping and laying slate.



Rust development on Otta slate (outdoors)

Otta slate contains small amounts of minerals such as iron oxides and sulphides that, over time, develop a golden patina when the slate is used outdoors. Read more about rust development on Otta slate.

The ageing process of slate – patina

Like most materials, slate adapts to the environment around it. This adaptation is manifested as a gradual change in the colour of the split cladding slate, called patina. Read more about how slate ages.

Dimensioning slate for pedestals

Light Oppdal, Otta and Offerdal slate have excellent flexural strength (up to 46.5 MPa) and we have a standard slate thickness of 2 cm for pedestal systems. Minera Skifer has conducted tests in collaboration with CBI/SP (the Swedish Cement and Concrete Research Institute) to determine the dimensioning of slate slabs for use in pedestal systems. Read more about the tests and the results.

General conditions of sales and delivery


Check out our brochures for inspiration and information!

We are sorry, but you are using a version of Internet Explorer that is not supported on this site. The browser is no longer updated by Microsoft and may therefore pose a security risk. We recommend that you use a different browser. Welcome back!