Shelter Survival

How to Build an Underground Survival Bunker: Part 1

primitive survivors underground bunker 1

In our previous article, we talked about why you need an underground survival bunker. They will come in handy in case of an economic downfall, nuclear attack, environmental disaster, or even a war! We also mentioned what makes a good spot for a bunker and why you’ll be needing a permit.

In this article, we’ll be covering how you can start building the underground survival bunker from scratch. You don’t need to be a billionaire to have one! The right materials, machinery, process, and strategies are enough.


Obviously, digging with a shovel is not a good idea, unless you have all the time in the world. You can rent excavation equipment or hire contractors if you want. Make sure to plan this process well as it will cost a significant chunk of money.

Here are some factors to consider as you do the digging.

Clean Water

A water tank in your bunker may seem practical, but it is not the best idea. These tanks will soon run out and refilling it would take a lot of time and effort. Large containers are also bulky and hard to conceal.

A great alternative is to tap into the water table and use a convenient water filtration system. Digging further to make a well is much easier than the previous idea. However, it will require more permits and cash!

Another way to have access to water is to set up a channel between your bunker and running water nearby. You can also try devising a rainwater harvest system for this.


Remember to dig a space for your escape route. You need more than one entrance and exit, especially if one gets blocked by debris or dead bodies to avoid being trapped. Two doors may be harder to monitor than one, but it’s worth the effort!


Dig extra space for your food supply. Your bunker will be the perfect place for food storage as it will keep them cool and dry. They are also out of sight!


In an underground vault, fresh air is probably what you’ll need the most, especially if you’ll be staying there for an extended period. Make sure to leave room for the air vents as you excavate to keep you cool during the hot weather,

Stock up on many filters and make sure to disguise both vents at the surface with rocks or bushes.

Materials to Use

The materials you will be needing depends on your budget. If you got the cheese, line it with thick-tempered steel like it’s a bank vault! Here are some options for you.

Thick Sheets of Metal

When supported by tube steel, the metallic bunker becomes the ultimate one! It won’t be infested, and it will be sturdy enough to resist any element.Β 


Bricks are also effective in supporting the walls and floors of your bunker. They are cheaper and great insulators. Blocks are also sturdy and do not decompose.


This is the most ideal and most reasonably priced material for your survival bunker because of its durability and the quick pour that makes it easy to install. It’s also what military bunkers use because of the safety and security it offers.

Strong Foundation is Key!

Your underground bunker won’t serve its purpose of helping you survive if it’sturdy enough to keep you safe and protected from outside elements. In fact, its collapse might even be the cause of your death!

This article focused on using the right materials and the factors to consider when doing the excavation. Tune in to our next article on the actual building of the bunker!

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