What environmental condition can deteriorate fabric covering?

Prolonged exposure to high humidity can significantly deteriorate fabric covering in aircraft for several reasons. Humidity can cause the fibers in the fabric to absorb moisture, leading to issues such as mold growth, which can weaken the material over time. The accumulation of moisture can also promote the breakdown of any adhesives or coatings that are part of the fabric covering system. In addition, high humidity can adversely affect the structural integrity of the covered surfaces as the fabric may stretch or shrink inappropriately, potentially leading to a loss of tautness and fit. It also increases the likelihood of corrosion in the underlying metal structures, further compromising the aircraft's safety and longevity. Thus, managing humidity is crucial to maintaining the integrity of fabric coverings used in aviation.