Green roofs

U ovom radu analizirana je i prikazana primjena zelenih krovova u zgradarstvu. Zeleni krovovi nisu neka suvremena tehnologija gradnje, već se pojavljuju i u najstarijim vremenima. Prvi oblici zelenih krovova bili su vrlo jednostavni i pokrivali su razne nastambe pod zemljom, a s vremenom se tehnologija njihove gradnje postepeno razvija pa dolazi i do izgradnje veličanstvenih primjeraka poput Semiramidinih visećih vrtova. Ideja suvremenog zelenog krova javila se zbog želje da se prirodi vrati zelenilo oduzeto gradnjom. Ovisno o vrsti zelenila, zelene krovove dijelimo na dvije osnovne skupine – ekstenzivni i intenzivni. Uz njih postoje brojne izvedenice tzv. poluintenzivnih zelenih krovova, a javljaju se još i biotopski zeleni krovovi. Suvremeni zeleni krovovi postavljaju na izoliranu nosivu konstrukciju, a se sastoje od razdjelnog i kliznog, zaštitnog, drenažnog, filtrirajućeg, apsorpcijskog i vegetacijskog sloja. Uz brojne prednosti zelenih krovova postoje i poneki nedostaci, ali njihova isplativost je i dalje visoka. Suvremeni zeleni krovovi javljaju se u cijelom svijetu, a posebno se ističu države s visoko urbaniziranim gradovima. U Europi, prednjače skandinavske, ali i sjevernoeuropske i srednje europske zemlje, dok su u Hrvatskoj zeleni krovovi iznimka te su uglavnom jednostavnog oblika s klasičnom ekstenzivnom vegetacijom.In this paper is shown and analysed the use of green roof in construction building. Green roofs are not a modern technology but have been used for centuries. The first examples of green roofs were very simple and used in underground houses. With technology, the green roofs have also developed for building the magnificent structures of Semiramida's gardens.The idea of contemporary green roofs was developed from the wish of returning the greenery that had been taken by construction. Depending on the vegetation, there are two types of green roofs - extensive and intensive. With that, there are also many different types of semi-intensive green roofs, and recently even biotopic green roofs. Contemporary green roofs are placed in layers on an isolated construction and are made up of a split and anti-slip, protective, a drainage, filtration, absorption and a vegetation layer. There are many benefits and some downsides to green roofs, but they are still very profitable. Contemporary roofs can be found all over the world, especially in highly urbanized countries. In Europe, most of them are found in northern and central Europe but in Croatia green roofs are an exception and are mostly simple with extensive vegetation