Insulation system for a roof structure

An insulation system (10) comprising an insulation structure adapted to be positioned above a supporting base layer (8), the upper surface of which defining a base plane (x,y), the insulation structure comprising one or more first insulation lamella(s) (1) having a length to be positioned parallel to said base plane (x,y) and having a support capability as seen in a direction perpendicular to said base plane (x,y). The insulation structure further comprises one or more second insulation lamella(s) (2) having a length to be positioned parallel to said base plane (x,y), where the support capability of the one or more first insulation lamella(s) (1) is greater than the support capability of the one or more second insulation lamella(s) (2) as seen in a direction perpendicular to the base plane (x,y) and where the insulation structure forms an alternating insulation structure of first and second insulation lamellas (1, 2).