A lot of these solutions are not very good advice. You need the humidity to be kept under 55% and under 45% would be better.
The US standard for humidity control in metrology labs discusses maintaining humidity control to insure bare steel gauges and measuring instruments do not corrode or cause measuring errors due to excessive humidity.
I know your safe is not a metrology lab but the contents are very expensive precision steel just the same.
Storage needs vary according to the local heat and humidity. If you live in the high desert every method that provides a roof will work. If you live on a bayou on the Gulf of Mexico near blowing salt water and chemical plant emissions you might need a different plan.
The US standard for humidity control in metrology labs discusses maintaining humidity control to insure bare steel gauges and measuring instruments do not corrode or cause measuring errors due to excessive humidity.
I know your safe is not a metrology lab but the contents are very expensive precision steel just the same.
Storage needs vary according to the local heat and humidity. If you live in the high desert every method that provides a roof will work. If you live on a bayou on the Gulf of Mexico near blowing salt water and chemical plant emissions you might need a different plan.
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