Strategy for demonstrating state of decay

The strategy I have followed to depict decay and structural failure in my building (Barcelona Pavilion) is that of human abandonment due to a plague which wiped out most of human life. Vegetation however continues to grow causing significant structural damage such as cracking, movement and direct damage from large trees falling onto walls and roofs. Glass has a long lifespan but is subject to breaking and cracking under structural pressure and extreme weather conditions. The roof of my building will also crack, leak and break into pieces exposing the understructure to further damage. Dirt, weathering and plant infestation will change the physical appearance of the materials making the building almost unrecognisable as compared to its original maintained state.