Window frame system for roof windows, base frame module, and method for connecting base frame modules

The window frame system (1) according to one of the preceding claims, wherein an outer sealing element (30) is provided at the distal end region of the drainage channel formation portion (20) for sealing against a window sash (4) associated with the first base frame module (2a).

The window frame system (1) according to one of the preceding claims, wherein the first connecting leg (12) and/or the second connecting leg (12) has an inner sealing element (32) for a window sash (4).

The window frame system (1) according to one of the preceding claims, further comprising an intermediate sealing element (34) for sealing a gap between the first connecting leg (12) of the first base frame module (2a) and the second connecting leg (12) of the second base frame module (2b).

The window frame system (1) according to one of the preceding claims, wherein the first connecting leg (12) and/or the second connecting leg (12) has/have a, preferably integral, profile structure.

The window frame system (1) according to one of the preceding claims, further comprising a first window sash (4) associated with the first base frame module (2a) and a second window sash (4) associated with the second base frame 30) module (2b).

The window frame system (1) according to one of the preceding claims, wherein each of the two base frame modules (2) has four frame legs (8) forming a frame and four load carriers or blades (16), which are each arranged at a corner region of the respective base frame module (2) and protrude beyond the frame in a longitudinal direction (L) of the connecting legs (12).

A method for connecting a first base frame module (2a) to a second base frame module (2b) of a window frame system (1), comprising the steps of:

• mounting the first base frame module (2a) on a roof structure, wherein a frame leg (8) of the first base frame module (2a) is designed as a first connecting leg (12) and the first connecting leg (12) has a drainage channel accommodation portion (24);
• providing the second base frame module (2b), wherein a frame leg (8) of the second base frame module (2b) is designed as a second connecting leg (12) and the second connecting leg (12) has a drainage channel formation portion (20);
• mounting the second base frame module (2b) on the roof structure next to the first base frame module (2a) by connecting the first connecting leg (12) to the second connecting leg (12), wherein in the connected state of the first base frame module (2a) and the second base frame module (2b), the drainage channel formation portion (20) extends from the second connecting leg (12) toward the first connecting leg (12) and its distal end region is accommodated by the drainage channel accommodation portion (24), so that a drainage channel is formed along the connected connecting legs (12), which prevents water from penetrating from above the drainage channel into a space between the connecting legs (12) below the drainage channel.