Window assembly • incorporating a wall delimiting a room, - that is configured as a thermal wall such that it incorporates a sandwich construction having two outer surface layers and an insulating layer disposed between them, - wherein the surface layer oriented towards the room is referred to as the inner side and the other surface layer as the outer side, • having a window opening formed in the wall - which is delimited peripherally by cut surfaces of the wall, • having an inner frame constructed from T-profiles, - wherein each T-profile incorporates a middle portion and two side portions (18, 19) opposing each other, - that extends into the window opening by its middle portion, partly covering a cut surface, - that rests against the inner side of the wall by a first side portion, - and the second side portion of which protrudes in front of the window opening, • and having a likewise rectangular outer frame constructed from Z-profiles, - wherein each Z-profile incorporates an outer portion that rests against the outer side of the wall, - having a middle connecting portion that is joined to the outer portion and that extends into the window opening and covers part of a cut surface of the wall, - and having an inner portion that is joined to the connecting portion and extends essentially parallel to the outer portion and protrudes into the window opening, • and having a window that incorporates a window frame, - that extends between the second side portion of the T-profile and the inner portion of the Z-profile - and is fastened to these two portions (19, 27). • incorporating a wall delimiting a room, - that is configured as a thermal wall such that it incorporates a sandwich construction having two outer surface layers and an insulating layer disposed between them, - wherein the surface layer oriented towards the room is referred to as the inner side and the other surface layer as the outer side, - that is configured as a thermal wall such that it incorporates a sandwich construction having two outer surface layers and an insulating layer disposed between them, - wherein the surface layer oriented towards the room is referred to as the inner side and the other surface layer as the outer side, • having a window opening formed in the wall - which is delimited peripherally by cut surfaces of the wall, - which is delimited peripherally by cut surfaces of the wall, • having an inner frame constructed from T-profiles, - wherein each T-profile incorporates a middle portion and two side portions (18, 19) opposing each other, - that extends into the window opening by its middle portion, partly covering a cut surface, - that rests against the inner side of the wall by a first side portion, - and the second side portion of which protrudes in front of the window opening, - wherein each T-profile incorporates a middle portion and two side portions (18, 19) opposing each other, - that extends into the window opening by its middle portion, partly covering a cut surface, - that rests against the inner side of the wall by a first side portion, - and the second side portion of which protrudes in front of the window opening, • and having a likewise rectangular outer frame constructed from Z-profiles, - wherein each Z-profile incorporates an outer portion that rests against the outer side of the wall, - having a middle connecting portion that is joined to the outer portion and that extends into the window opening and covers part of a cut surface of the wall, - and having an inner portion that is joined to the connecting portion and extends essentially parallel to the outer portion and protrudes into the window opening, - wherein each Z-profile incorporates an outer portion that rests against the outer side of the wall, - having a middle connecting portion that is joined to the outer portion and that extends into the window opening and covers part of a cut surface of the wall, - and having an inner portion that is joined to the connecting portion and extends essentially parallel to the outer portion and protrudes into the window opening, • and having a window that incorporates a window frame, - that extends between the second side portion of the T-profile and the inner portion of the Z-profile - and is fastened to these two portions (19, 27). - that extends between the second side portion of the T-profile and the inner portion of the Z-profile - and is fastened to these two portions (19, 27).