Roof window, a kit with a covering assembly, and a method for mounting a roof window

A kit comprising a roof window, which is configured for being mounted in a roof structure comprising a roofing material and a covering assembly, said roof window comprising a frame and a sash carrying a pane, where the frame comprises a plurality of frame members together defining a frame opening and a frame plane, wherein the plurality of frame members includes a top frame member, a bottom frame member and two side frame members and the frame plane passes through each of the top frame member, the bottom frame member and the two side frame members, and each frame member extends in a length direction, where the frame comprises an interface unit extending in the length direction of at least one frame member,

• where said covering assembly comprises a plurality of flashing members configured for covering a joint between the frame and the roof structure, and
• where the interface unit comprises a flashing reception groove configured for receiving a flange of at least one flashing member via a groove opening by insertion in a direction parallel to the frame plane, said flashing reception groove extending in the length direction of the frame member, wherein a width axis of said flashing reception groove passing through the groove opening and a portion of the interface unit opposite the groove opening extends parallel to the frame plane when the roof window is installed, and
• where one or more protrusions are provided in the flashing reception groove for engagement with the flange(s),
• wherein the protrusion(s) is/are made by co-extrusion with one or more parts of the interface unit delimiting the flashing reception groove and that the flange of at least one flashing member comprises a marking indicating an intended insertion depth of the flange into the flashing reception groove.

A method for mounting a roof window in a roof structure comprising a roofing material, said roof window comprising a frame and a sash carrying a pane, and said frame comprising a plurality of frame members together defining a frame opening and a frame plane and each extending in a length direction, wherein the plurality of frame members includes a top frame member, a bottom frame member and two side frame members and the frame plane passes through each of the top frame member, the bottom frame member and the two side frame members, wherein said method comprises the steps of

• A) arranging the roof window in an opening in the roof structure,
• B) arranging a plurality of flashing members to cover a joint between the frame of the roof window and the roof structure by displacing the flashing member in a direction parallel to the frame plane thereby inserting a flange of at least one flashing member in a flashing reception groove in an interface unit on the frame via a groove opening of the flashing reception groove, a width axis of said flashing reception groove passing through the groove opening and a portion of the interface unit opposite the groove opening extends parallel to the frame plane, said interface unit and said flashing reception groove both extending in the length direction of the frame member,
• wherein
• during step B) the flange(s) comes into engagement with one or more protrusions in the flashing reception groove, said protrusion(s) being made by co-extrusion with parts of the interface unit delimiting the flashing reception groove, and that the flange of at least one flashing member comprises a marking, and that the displacing of the flashing member is continued until the flange is inserted so deep in the flashing reception groove that the marking reaches or is hidden by the interface unit.