A blast protection wall uses a sandwich wall panel of a first and second metal plate and a layer of fibers of e.g. mineral wool between the first and second metal plate. The sandwich panel is held in place using a support structure comprising support posts. A mechanically plastic baffle connected between the support structure and the sandwich wall panel. The mechanically plastic baffle may be elastically compressible at least for small compressions, plastic compression arising for larger compression. The baffle may contain a mechanically plastic folding zone, configured to make a contact with the support structure or the sandwich wall panel only after a distance between the support structure and the sandwich wall panel is reduced by a predetermined amount by elastic compression of the baffle.