Storage Of Coins In Safes

I guess it all depends on the quality of the safe.
I've had my safe for almost twenty years now, it's well sealed and I put dessicant packs in.
Never had any problem.

Although my safe weighs 480 lbs. it
is not as secure as a SD box.
My neighbor had an even larger safe and a pair of thieves removed it from the second floor in broad daylight in about twenty minutes.
My wife saw them removing what she thought was a large heavy dresser under a tarp on a mover's dolly.
One of them told my wife he was Tom's brother getting some furniture.
My wife noticed the make and model of the truck but didn't get the licence number as one of the thieves had mentioned the neighbor by name.
There was 5 handguns and $20,000 of gold jewelry in the safe.
The jewelry was unique and most was recovered in about six months.
The guns are still out there.

I would recommend like above. Use desiccant, make sure the safe isn't in a place that gets wet or very humid or very hot or cold.

Some safes are designed to keep things moist. Document safes are deliberately designed to slightly humidify the atmosphere (because paperwork becomes brittle if kept in a fully dehumidified environment), and fire safes are designed to out-gas moisture when heated. Both are undesirable for coins.

Coins won't "go moldy", but they can suffer from exposure to a moist environment, especially if that environment is not kept at stable temperature; condensation will form on metal surfaces if a moist environment is cooled, and it is that condensation that causes the damage to coins. Of course, the paperwork and ephemera that often goes with the coins (mint set cases and certificates, etc) can go moldy if kept too moist.

Storing desiccant in the safe will eliminate the possibility of condensation. Just remember, desiccant isn't magic, as it does its job it gradually absorbs water and will eventually become "exhausted" once it's absorbed its full capacity; it will then need to be dried out again (leaving it in an oven at 100 deg C for an hour ought to do it). Leaving exhausted dessicant in the dafe will literally do nothing to help you. If it's legal to obtain in your country, try obtaining some of that "indicating desiccant"; the silica gel with added cobalt chloride is perfect - it's blue when active, and turns pink when exhausted. That way you can tell at a glance if it needs changing.

Of interest to coin collectors. Very old and VERY heavy safe made it thru the worst fire. Home was reduced to less than rubble. Old safe made it with contents.

BOLT the safe down. Add a layer of sheetrock, green sheet rock, or cement board to the sides and double the thickness on the top of modern safes - regardless of fire rating.

https://coinweek.com/coins/certifie...se-wildfire/

TinyRetreat,
Congrats on 50 post
John1

Very cool.
Ordered.

That thing is pretty cool. I assume you leave the recharge base out of the safe? How big is the dehumidification stick itself? Do the beads ever have to be replaced? Thanks for sharing!