Abstract: A building closure for temporarily closing a bare opening in a wall in a building under construction or renovation. The building closure includes a closure frame made up of a number of bars and defining an opening mainly congruent with the wall opening, a plastic sheeting fastened on the closure frame and spanning its opening, and fastening members for fastening the closure frame to one side of the wall in an area around the wall opening. Each of the bars of the closure frame is V-shaped, has a first part mainly at right angles to the plane of the window and defining the closure frame opening, and a second part mainly at right angles to the first part and defining the periphery of the closure frame. The closure according to the invention can cover a bare wall opening in a building under construction or renovation in a less expensive, easier and tighter manner than known so far, with the two parts of the closure frame closing tightly maintained around the edge of the wall opening.