A temporal window kit (10), including: a sheet (18), for being rollable about a cylinder (16), the width (60) of the sheet (18) for being smaller than the width (58A) of a first structure opening (56A) at least one area-completion item (28A, 28B), for adding to the width (60) of the sheet (18), for completing to the width (58A) of the first structure opening (56A) and a first extendable rod (12A), for pressing each of the at least one area-completion item (28A, 28B) onto one of walls (54A, 54B) of the first structure opening (56A), and for setting the cylinder (16) between the walls (54A, 54B) of the first structure opening (56A) by the pressure, thereby installation of the temporal window kit (10) to the first structure opening (56A) turns it to an openable window.
