Here you will find answers to practical questions about purchasing and delivery, dimensions and surfaces, slate roofs, installation and documentation. If you are wondering what makes the stone itself special – lifespan, colour, maintenance and environment – you will find the answers under Why Ottaskifer.
Otta Skifer sells Ottaskifer through a number of dealers in Norway, and directly to contractors and larger business customers. Contact us and we will help you find your nearest dealer.
Ottaskifer is a stock item, and most standard products have a short delivery time – either from the dealers’ own stock or from our main warehouse in Otta. For custom-made and tailored products, allow for a somewhat longer delivery time. Read more under delivery terms.
Yes, we are always taking on new dealers. Send us an email at post@ottaskifer.no if you would like to become a dealer.
Our range includes floor tiles, steps, flagstones, window sills, paving slabs, benches and tables, kitchen worktops, fireplace slabs, skirtings, strips, roofing slate, facade slate, dry stone walling and machine-cut walling. See all our products.
We produce fixed sizes, random lengths, gauged (calibrated) slate and custom sizes to drawing. Slate tiles are available in widths of 200, 300 and 400 mm in random lengths, and in the formats 300×300, 400×400, 300×600 and 400×600 mm. Other sizes and thicknesses are available on request. See slate tiles.
Ottaskifer is supplied with a natural, brushed or honed surface, and the edges can be sawn, brushed or honed. Otta Rust is only supplied with a natural surface, as its characteristic rust colour disappears when the stone is processed. See product information.
Ottaskifer comes in two types. Pillarguri is blue-black, almost black. Otta Rust has a warm rust colour from the uppermost, rust-bearing layers of the quarry, and is only supplied with a natural surface.
Tiles in a thickness range, for example 8–17 mm, vary slightly in thickness from tile to tile. Small irregularities are taken up with the right amount of adhesive. Gauged tiles are diamond-milled on the back to the desired thickness and can be fixed directly to the substrate with tile adhesive for natural stone, which makes installation faster.
There are four traditional formats: square slates, scalloped slates, rectangular slates and random flagstones. We also supply urban roofing slate – rectangular 300 × 600 mm slates fitted horizontally between metal profiles for a more modern look. See slate roof.
It depends on the format and the overlap. With small and medium-sized square slates, you need approximately 1.4 m² of roofing slate per m² of roof area, based on a 50 mm overlap. Rectangular slates require a larger overlap and therefore more slate. For roofs laid with random flagstones, we recommend ordering slate equivalent to twice the roof area.
Yes. Roofing slate is supplied with clipped edges and pre-drilled for easy and correct installation, and most formats are supplied with gauged thickness. Laying instructions for square slates can be downloaded from the slate roof page.
Use slate adhesive or mortar adhesive designed for natural stone, and follow the adhesive manufacturer’s instructions. Outdoors, good groundwork with effective drainage is essential to avoid stains and blotches on the surface. Installation guides from Mapei and Laticrete are available under product information.
Under product information you will find technical data, product specifications and operation and maintenance (FDV) documentation for floors, stairs, walls and facades, paving, walling stone and outdoor areas, as well as guidance on fixing slate with adhesive.
Otta Skifer is the name of the company, while Ottaskifer is the product – the slate we quarry and process. Read more about Otta Skifer.
Didn’t find the answer you were looking for? Contact us and we will be happy to help.
