Designing anti-metal-detector underground storage

[zeemang]

The more metal you put in it and under it will just make it more detectable. Best place to hide stuff, in plain sight. Lots of secret doors built in to furniture, false bottoms in cabinets, fake appliances, etc.

 

[Ice Scratcher]

The more metal you put in it and under it will just make it more detectable. Best place to hide stuff, in plain sight. Lots of secret doors built in to furniture, false bottoms in cabinets, fake appliances, etc.

Exactly, a ton of silver, bunch of gold, bunch of steel/iron, bunch of any metals, all sound and look the same to any metal detector or gpr...

<°)))>{

 

[GKL]

Maybe have a large yard shed with a removeable plywood floor, have a storage container in the ground underneath that floor and use the shed to store your lawnmower and yard tools, no detectorist is likely going to think to detect under your shed floor

 

[GTS225]

no detectorist is likely going to think to detect under your shed floor

*****************************************************

Well, they might now!

Roger

 

[Rudy]

what about a Faraday box or something similar ... I like the idea I could lay down Faraday fabric over the hidden object and it will just disappear to MD's.

that is if it works that way:

https://www.amazon.com/Shielding-Bl...words=rf+shielded+boxes&qid=1573919417&sr=8-3

A Faraday box shields what is inside from receiving an external field. It also also prevents an internally generated field from getting out. However, The Faraday box itself, which is built out of electrically conductive material, is easily detectable.

 

[GKL]

*****************************************************

Well, they might now!

Roger

 

[TrenchKnife]

cables and wires and cord

However, The Faraday box itself, which is built out of electrically conductive material, is easily detectable.

OK ... then what is a shielded wire shielded with?

wrap the treasure in that!

 

[Rudy]

OK ... then what is a shielded wire shielded with?

wrap the treasure in that!

The shield in a shielded cable, is just like a Faraday shield and easily detectable.
https://en.wikipedia.org/wiki/Shielded_cable

What is worth noting is that, although the Faraday shield is easily detectable by a metal detector (as long as it is in range), the shield does prevent the detector from detecting what is inside. In other words, if you had gold coins inside the Faraday shield, the detector can detect the shield but not the gold coins.

 

[cellrdwellr]

 

[Dewsweeper894]

Simple . But a grave stone or marker above said stash and bury the loot in a box underneath the iron box with the name Sparky engraved on it . ( no need for anyone digging past that signal .

 

[Dewsweeper894]

I am going to melt down all my gold and mold it into a wash line post paint it black and concrete the thing into the ground .
The best hiding spot is right in front of everyone .
Solid silver flag pole?
Platinum bbq grill ?
A mirror with a half inch thick silver backing instead of a paper thin layer ?

Come on guys .... think outside of the box once .
Copper land scape stones around your shrubs ?

 

[chillforlife]

Just because you're paranoid, doesn't mean that people aren't out to get you.

 

[amc rulz]

What we do around here is, we paint our gold bullion bricks black, use them for doorstops.
Who’d ever know?

 

[cellrdwellr]

What we do around here is, we paint our gold bullion bricks black, use them for doorstops.
Who’d ever know?

I have a red door, and I want to paint it black that's a good idea, I would use black flex seal or plasti-dip.

 

[GTS225]

Here's another; Live in a rural setting? Fabricate a "pipe safe" insert for your well pipe. Slip it down so that it's just above the pump, and reinstall the cap...
Sure, if the pump goes bad, you'll have to pull everything, but it's again, hidden in plain site.

Roger

 

[Tpmetal]

First off buy a reasonable size safe. One large enough that it takes two people to move it with difficulty. Do not bolt the safe to the floor or any thing. Put some heavy objects in the safe. Lock it up and forget the combination if you like. When the thieves come in they will forget your valuables and go to the trouble of stealing the heavy safe while your valuables are hid in old dirty coat pockets in the attic. Don't tell any one what you have done. Most house burgles are done by someone you know. If they leave the safe and steal your stuff you know it's an inside job.

smart man here

 

[Silver_Seeker]

Hire a metal smith to melt down your gold / silver and mold into the shape of dog poo.

Paint accordingly and place in back yard, safe forever. : )

 

[hoser]

I'm kinda confused here. Is this for a bugout plan that you need to get to it quickly and quietly and not be seen. Or is this just in case of robbery reasons. In either case think about what plagues detectorists the most, EMF! If I'm going
to bury a stash where most if not all detectorists would be unable to locate it, I would find a high voltage transmission power line. The ones with metal towers. Take your detector there, turn it on and see how much distortion you get. If it would be difficult for you to detect, so it would be for others. Bury your stash next to one of the tower leg footings. Most of these towers have ID tags, so all you have to do is remember the place or tag number. Now this would be more for a bugout situation where your house is in danger of being over run. Just my two zincon cents. Interesting thread.

 

[GTS225]

Now, this ain't bad at all. Sure, you're trespassing on a right-of-way, and if it's found, there's no way you can claim it back, but the EMF will sure work in your favor.
I wonder how well this would work for lower voltage, (220-440) buried lines in a residential area?

Roger

I'm kinda confused here. Is this for a bugout plan that you need to get to it quickly and quietly and not be seen. Or is this just in case of robbery reasons. In either case think about what plagues detectorists the most, EMF! If I'm going
to bury a stash where most if not all detectorists would be unable to locate it, I would find a high voltage transmission power line. The ones with metal towers. Take your detector there, turn it on and see how much distortion you get. If it would be difficult for you to detect, so it would be for others. Bury your stash next to one of the tower leg footings. Most of these towers have ID tags, so all you have to do is remember the place or tag number. Now this would be more for a bugout situation where your house is in danger of being over run. Just my two zincon cents. Interesting thread.

 

[davedude]

Hi,

I am researching how to bury valuables underground in a way that makes it very difficult or impossible to use metal detection or ground-penetrating radar to discover the burial locations.

Suppose I am building a structure on a concrete slab of perhaps 100ft x 50feet in size, with a slab thickness of 6". At one or more locations beneath the slab I'd like to bury, for instance, a 2" diameter x 6" long PVC pipe containing silver coins, say, 30" below grade. (So, 8" of concrete, then 22" of soil cover.)

6" of concrete with 1/2" rebar on a 12" x 12" grid itself might present some challenges for some kinds of detectors, but I want to substantially "upgrade" the concrete's resistance to metal detectors if possible.


Aside from normal rebar, could I add say, 2-4% by weight of a finely-ground conductive metal powder like iron or aluminum to the concrete mix? (Assume for sake of discussion that this would not adversely affect the pouring or strength / durability characteristics of the concrete -- I would research those impacts elsewhere.) Would that be enough metal content to confuse metal detectors?

Maybe 2-4% metal content in the mix isn't anywhere near enough. What about dumping say 1/2" thick layer of solid aluminum shot on the ground before the concrete is poured? (Say 5-7mm diameter shot size --effectively making highly-conductive but rough-surfaced metallic mat beneath the concrete.) (Again, ignore any issues around aluminum-concrete chemical or mechanical incompatibility, I will research those elsewhere.)

Please also suggest if there are other methods that might be cost-effective and not too hard to implement.

Would masking that stuff with iron work? I been watching youtube videos of how iron masking really screws up both ATPRO's and NOX800's.

Use some iron pipe for sewer or black pipe for natural gas under the slab so it is documented part of the structure. Find a way to use that to mask valuables. Might be pretty easy to set up a test with your detector to see if it would work.