Päällystetyt

Päällystetyt is a Finnish adjective form meaning “coated” or “paved,” used to describe surfaces or objects that have been given a protective, decorative, or surface-covering layer. The term is the plural past passive participle of the verb päällystää, with the singular being päällystetty. It is commonly attached to nouns to indicate that a coating or paving has been applied, for example a road, roof, or metal surface.

In usage, päällystetyt is most often found in contexts related to construction, urban planning, and materials science. Common phrases include päällystetyt tiet (paved roads), päällystetyt kattojen pinnat (coated roof surfaces), and päällystetyt metallipinnat (coated metal surfaces). The form signals that the surface has undergone a coating process, typically for durability, weather resistance, or aesthetics. It contrasts with päällystetty, the singular form used with a singular noun (e.g., päällystetty tie = a paved road).

Related terms include päällystys (the act or process of paving/coating) and päällyste (the coating, surface layer, or paving material). The concept is widely applied across fields such as road construction, shipbuilding, metal fabrication, and architectural finishing, where various coatings—such as asphalt, paint, or metal platings—are applied to extend life and improve performance.

Overall, päällystetyt functions as a descriptive term in Finnish, indicating that multiple items or surfaces have been surfaced or coated.