A slate roof is the king of durability in the roofing world. This natural stone material lasts for centuries — many European slate roofs are over 200 years old and still in excellent condition. In Finland, slate is rarer but a highly valued choice for demanding projects.
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Technical Specifications
80–100 years
25–40 kg/m²
20 year interval
90–150 €/m²
30 years
25°
High — recyclable
Suitability
Why a slate roof?
Slate is a natural material that offers unparalleled durability. It withstands frost, UV radiation and mechanical stress decade after decade. Slate's natural colour and texture give the roof a unique and prestigious appearance that no industrial material can replicate.
Types of slate
The most commonly used slates in Finland come from Spain, Wales and Norway. Slates of different origins vary in colour (grey, dark, greenish) and properties. Spanish slate is the most affordable, while Welsh slate is considered the finest in the world. Small quantities of domestic slate are quarried in Kainuu.
Slate roof price
The price of a slate roof is typically 120–250 €/m². The high price is due to the quality of the material and the fact that installation requires specialist expertise. Each stone is installed by hand. Thanks to its long lifespan, the annual cost is nevertheless competitive with cheaper materials.
| Feature | SlateRecommended | Tile Roof | Copper Roof |
|---|---|---|---|
| Lifespan | 75–150+ years | 40–80 years | 80–100+ years |
| Price | 120–250 €/m² | 70–100 €/m² | 100–180 €/m² |
| Weight | 25–40 kg/m² | 40–55 kg/m² | 5–7 kg/m² |
| Maintenance | Virtually maintenance-free | Minimal | Maintenance-free |
| Appearance | Natural, unique | Classic | Patinating |
Slate roof maintenance
A slate roof is virtually maintenance-free. The only regular maintenance is a visual inspection and replacement of individual broken slates. Gutter cleaning and checking the seal of penetrations are part of normal roof maintenance. Slate requires no painting or coating.
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Content reviewed and verified
Updated: April 2026
