CONCEALED WINDOW AND DOOR FRAME
The invention relates to a plastic, especially polyethylene, concealed frame, which can be directly set in concrete. The inventive frame comprises a base element (1) and a frame (3), said frame (3) being able to move to a certain extent in relation to the base element (1) before being definitively joined thereto (1) in order to offset tolerances. Preferably, a step (5) is provided in the lower side of the outer surface of the frame (3), which can be used as a traction edge when fitting full thermal insulation (6). Plastic screws (4) should be used to join the frame (3) to the base element (1).