Slate roof – Timeless elegance and long-lasting quality
Slate roofs are gaining popularity among more and more people and it is not only because it is exclusive and beautiful. Roof slates are characterized by particularly high quality. The biggest advantage of a slate roof is its impressive durability. A slate roof is practically maintenance-free. Provided the correct installation, gives it solid protection against the weather and lasts for generations.
The quality is not only outstanding, it is also timeless. Imagine this: you can take slate from a 100-year-old house and use it on a new house. It is this ability to stand the test of time that makes the slate roof extraordinary! It is therefore no wonder that Norwegian roofing slate is among the most reused building materials we have.
The roof slate is available in various formats and dimensions, so you can adapt the appearance to your wishes. Our slate from Pillarguritoppen is mainly black. Minerals in the stone will take you on a natural journey from black to golden rust. It can take several years for the slate to acquire its final patina. With roofing slate from us, you can really look forward to a lasting and beautiful roof!
Lifespan and choice of materials
When it comes to roofing, durability is the key, and phyllite slate roofs from Otta Skifer are the symbol of longevity and reliability. Choose a roof of lasting quality that will last for hundreds of years.
To ensure that your slate roof remains a masterpiece for generations, every single component is essential. It’s all about planning for the future – from the solid false ceiling to the choice of high-quality materials for battens and fasteners. We do not just offer a roof, but an investment in durability – a roof that does not require renovation in the first hundred years. Choose quality from the ground up and enjoy a slate roof that stands the test of time.
Different types of slate roofing
There are four different formats of stone that are used for slate roofing: square stone, lapped slate, rectangular stone and wild slabs. Which variant is chosen largely depends on the desired appearance of the slate roof.
Most formats of roofing slate delivered from Otta Skifer are delivered with adjusted thickness. The advantages of uniform thickness are many:
- he slate will lie more stably
- Less risk of the slate breaking when you walk on the roof or the slate roof being heavily loaded with snow and ice
- The roof becomes smoother
- The entire delivery is delivered in one thickness instead of within a thickness interval
- The risk of the slate breaking during packaging and transport is reduced
Roof slates are delivered with cut edges, pre-drilled for easy and correct installation.
Square stone
Square stone is the most used shape of a slate roof. The square stone is mounted diagonally on the roof, with the point down. This form of slate roofing results in the least amount of overlap.
On small and medium-sized dimensions, approx. 1.4 m2 roofing slate per m2 roof surface. Laying tables are calculated with a 50 mm overlap on small and medium-sized dimensions. On the very largest dimensions, the overlap is 100 mm.
For each dimension of square stone, there is a corresponding eave stone, ridge stone and gable stone. Eave stones and ridge stones have the same shape and dimensions. The gable stone is half a square slab that is divided vertically from tip to tip. Hole placement for fixing means that gable stones must be specified on the right and left gable.
Rectangular stone
Rectangular stone for slate roofing has the same format as scallop, but they are different in shape and give a tighter look. The rectangular stone has straight sides and is mounted rectangularly. A slate roof with rectangular stone must have a larger overlap, and thus also a higher specific weight than a slate roof with square stone. A larger amount of slate is included for a rectangular slate roof than for a slate roof with square stones.
For slate roofs with rectangular stone, gable stone and strip for footing stone and ridge are supplied. Each row of slate ends with a normal stone in every other row and a gable stone in every other row. The gable stone is 1.5 times the width of a normal stone. The footstone that is installed along the gutter is twice as long as the width of a normal stone.
Scallop
Scallop is drop-shaped, and is also called drop slate. A slate roof with patchwork has a rounder and softer appearance than a roof with square or rectangular stones. The lapstone has a round shape at the bottom end and is therefore more reminiscent of traditional roof tiles.
Flagstones / Wild slabs
Flagstones are slate slabs with an irregular shape. Slate roofs with flagstone are the oldest form of roofing. The quarry slabs are delivered as medium-sized or large quarry slabs, most often in a thickness of 20-30 mm.
Adaptation of the quarry slabs is done on the construction site. Holes are then drilled for fastening or notches are sawn in the edge of the slabs.
If wild slabs are used, there will be more overlap. This form of slate roof therefore entails a relatively large dead weight, and the house’s construction must be dimensioned to withstand the load. As a lot of slate slabs are used to overlap, it is recommended to order slate for twice the area of the roof surface.
Urban roofing slate
Urban roof slate is a newer variant of slate roof where rectangular slabs are mounted horizontally between vertical metal profiles. This type of roof slate gives a more modern and tight look than traditional slate roofs. The slate is delivered in standard dimensions 300 x 600 mm and thickness 12 mm. The edges can be sawn or cut like normal roofing slate
Assortment
SLATE ROOF
Square stone
Size 55 × 55 cm (21″ x 21″) thickness 10-20 mm
Square stone
Size 47 × 47 cm (18″ x 18″) thickness 12 mm
Square stone
Size 38 × 38 cm (15″ x 15″) thickness 12 mm
Scallop
Size 25,5 × 41 cm (10″ x 16″) thickness 8-20 mm
Scallop
Size 18 × 33 cm (7″ x 13″) thickness 8-20 mm
Flagstones / wild slabs
Comes in different sizes, for more information please contact us directly
Instructions for use
Easy to install
Almost no waste
The best quality
No harmful emissions
Long service life means low life cycle costs
A natural product
Slate roofing in Scandinavia
In Norway, slate has been used for roofing for hundreds of years, in fact we find the earliest signs of slate on roofs from as early as the 15th century. Then slate was naturally mostly used in areas that were close to slate deposits, such as in Otta and surrounding areas.
With the development of the railway in 1890 and not to forget the development of roads, roofing slate could be transported from the large production sites to the whole country. In the latter half of the 1990s, roofing slate also had its heyday as an export product to other European markets.
Roofing slate was seriously used on houses and buildings between the First and Second World Wars. Today, roofing slate is used on public buildings and on cottages and houses. Roof slate gives you a roof with long traditions and a very long life. For us at Otta Skifer, roofing slate has been one of our main products since we started producing slate. Roofing slate that is mined and processed at Otta is a black and rust-coloured phyllite slate that gives a lovely surface effect.
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