Bomb Shelters

PHONE: +1 757-486-0084
Hardened Structures
Hardened Structures

Bomb Shelters

Our team of highly qualified and specialized engineers have the required expertise to ensure your Bomb Shelter will be designed and engineered to mitigate any number of threats that you wish to protect yourself, and your family from.


At Hardened Structures we design our civilian underground Bomb Shelters primarily for nuclear weapons of medium to large size but also secondary for chemical, biological and radiological dispersion devices and conventional weapons. Also known as Weapons of Mass Destruction or WMD’s. Although the design and dimensions are principally determined for nuclear weapons it can be established that a good underground nuclear bomb shelter also offers excellent protection against chemical, biological and conventional weapons along with most types of WMD’s. In addition, with the ever increasing importance of having EMP (Electro-Magnetic pulse) protection of Bomb Shelters, and other “HARDENED” structures, we provide State of the Art EMP mitigation both in terms of Bomb Shelter design engineering, which incorporates EMP shielding, and the usage of specialized EMP components.

The extent of protection for private civilian underground bomb shelters will, in general, be determined by Blast Overpressure measured in “Bars”, (where 1 Bar equals 15 psi of applied Blast Overpressure) and initial radiation mitigation. Protection against the penetration of chemical, biological and radiological weapons is achieved by constant positive internal air pressure maintained by artificially filtered ventilation and air-locks. At Hardened Structures we use only Military Grade NBC air filtering systems, blast doors, blast valves and other shelter components.


The United States National Planning Attack Scenarios have identified the detonation of a 10-Kiloton (KT) Improvised Nuclear Device as the most likely incident of a nuclear bomb exploding within this country. As a reference, the Hiroshima bomb was 12-KT and the Nagasaki bomb was 22-KT.

In this scenario a 10-kiloton improvised nuclear device is smuggled into the center of a large metropolitan city inside a delivery van and detonated. Casualties are estimated to be in the hundreds of thousands with infrastructure damage within a bounded range of effect of 1 to 3 miles. It is estimated that 1 million + people will attempt self-rescue by evacuating and contamination in varying levels will encompass approximately 3,000 square miles.


To properly plan, design and construct a customized underground bomb shelter for our individual clients we must first:

  • Identify the threat levels; blast overpressure, radiation, etc.
  • Identify the assets to be protected; people, possessions, food, water, etc
  • Determine the length of the shelter duration
  • Thoroughly examine the site and geotechnical conditions
  • Be aware of all regulatory agencies having jurisdiction

Once this information is assembled a Protection Program and Cost Model Budget is then submitted to the Client for their review and approval.

Please contact Hardened Structures for additional information and to start planning your bomb shelter.

Also you can check out our Bomb Shelter Restoration services.

We can also provide all components for bomb shelter construction at

Bomb Shelter

Bomb Shelter Blast Valves
Blast Valves Ready for Shipment
Bomb Shelter Air Filters
Automatic NBC Air Filters for Larger Installations

Various NBC Air Filter Sizes Available

Bomb Shelter CO2 Removal
ESL–CO2CO2–230230–B is fully automatic Regenerative Carbon Dioxide Removal System.
The System is designed to be used in any
facility having a gastight envelope that needs to be fully closed in
dangerous situations. Removing carbon dioxide (CORemoving CO22)
from the atmosphere is an important function
of a life supporting system.

Executive Home with Bunker
Genesis Living Pod with dining Pod