Installing the new door frame
After that comes the assembly of the door frame, docking it "n"-shaped, and then installing this very box in the doorway. And such things are done as for the entrance door, as well as for interior doors.
After your master has mounted the door frame with the leaf in the right position, if possible, you need to seal the box with masking tape in order not to damage it with the installation foam. Before you foam, the opening for the door frame must be prepared. To do this, use a brush to sweep away the remains of dust and dirt from the opening and for better adhesion (bonding) by spraying the surface with water. Foam all professional assembly foam around the perimeter of the door unit. Approximate consumption of the material: 0.5-1 bottle on the door unit. Foam drying time - at least 3 hours, full drying — 12 hours.