Discovery of the pavilion led to the arrival of moisture starting the slow, inevitable process of decay; humidity sometimes reaches 90% inside the Domus. Heavy rain was blamed for the collapse of a chunk of ceiling. The presence of trees in the park above is causing further damage, as tree roots are slowly sinking into the walls, damaging the ceiling and frescoes; chemical compounds released from these roots are provoking additional deterioration. Unfortunately, many of these trees cannot be uprooted without damaging the Domus.