Ok, this is going to sound like the most stupid question ever. I store my certified coins in a small safe, and there is no more room to store them in those PCGS/NGC plastic cases. To save room I currently stack them on top of each other in stacks of 8. I thinks that’s ok, but I wonder if you have any feedback.
Pretty small safe if you can only stack 8 high since there's no reason why you couldn't stack them 20 or 30 high, except for stability. I went to boxes without the separators so more slabs could be stored in a box for the same cubic space as a PCGS/NGC box. But there's no reason why you can't or shouldn't cram the slabs into the safe until it's absolutely packed full, so long as you can still get them out. To avoid the possibility of slab scratching slab as you move them in and out of the safe and their stacks, you might want to invest in some of those polyethylene bags that, I think, are used for baseball cards and slabs.
Check out Steelwater. They have some nice burglary/fire options that are an ideal size. Now you can stand up whole albums if you want and store boxes. Might be time to break out a grand and upgrade. You can remove the door on most of them for moving eaiser but once together, bolted down with weight in them, they aren't going anywhere and you won't be asking this question anymore. You can also tell them the combo you want before they send it. So if you have a main combo you have memorized, you can add digits to the numbers and apply it to another safe to easily remember that one. A good friend shared all of this with me. Here, this is what you want: https://steelwatergunsafes.com/product/steelwater-fire-burglary-safe-swbfb-845/
There are three sleeves in the safe, and I have to stack them in the bottom shelf. The top 2 are full, and I cannot fit a pcgs or ngc case in the bottom case, thus I have to stack.
Stack away! I do it for convenience when coins are at home. Most of them spend most of their time in a safe deposit box. Wish NGC and PCGS slabs would lock together when stacking … guess it’s too much to ask for a little standardization. If you live in a humid climate or it’s a fire safe anywhere, then using dehumidifier packs is advised. Also realize that unless the safe has a UL theft rating, it’s only going to protect against opportunist and amateur burglars … a pro will be into it in minutes. Cal
Someone will come along shortly and say those are rookie numbers If it's anything like passwords I'd have to continuously be looking up numbers. I will say if someone is looking for another one, check craigslist or the like for someone moving that doesn't want to take with them. It's a buyers market in that regard and you can save money.
Ditto. I did the same. If you swap out your slotted plastic slab boxes (which I realize you might not want to do) and go with unslotted storage boxes instead, you can fit 25 slabs to a box in essentially the same space that was previously taken up by each 20-slab PCGS/NGC box. That's what I've done in my own safe deposit drawer, which is nearly maxed out as far as interior space goes.