A nice project on the roof of kindergarten, the green roof is visible from second floor of kindergarten. This roof is example of soil loss. This is why it is important to check and maintain the vegetation on the extensive green roofs. Even the extensive green roofs need low maintenance, it is still maintenance. 1 -1,5 cm of soil should be added to reach 3 cm soil depth on this roof.
Link to kindergarten: https://www.oslo.kommune.no/barnehage/alle-barnehager-i-oslo/sognsveien-barnehage/
Link to project which is done by GASA AS: http://www.gasa.no/?prosjekt=sognsveien