Shelters and Security

Valhalla Construction LLC logo 

(208) 691-6726

Hardened Structures
Panic Rooms
Wine Cellars
Hidden Access
Vaults and Safes
Basement Conversions

We take these projects seriously, guarantee privacy and confidentiality, and will work with you to design security solutions custom tailored to your needs and requests.

Black Rock Hardened Structures Inc is a full service design-build construction company. Confidentiality is important when designing and constructing a vault, panic room, bunker, and other security type elements. 

By keeping the design-build process in-house, we keep the number of people who know about your project to a minimum. You will deal with directly with the designer, drafter, and builder, minimizing the involvement of 3rd party companies and people. 

Complete design and engineering for any project, regardless of scope or size. 

  • Site consultation
  • Professionally Designed
  • Complete Construction Management and Site Security
  • Confidentiality and NDA agreements and contracts
  • Compartmentalized and segregated construction phases
  • Zoned early warning and detection systems
  • Area denial obstacles and perimeter security
  • Remote control and access systems
  • Audio and visual surveillance systems
  • Biometrics and optical security access
  • Blast and vault doors
  • Hardened structures capable of resisting small arms fire and common rifles and weapons (up to .50BMG). 
  • Bullet resistant doors and window protection
  • Emergency ballistic shutters
  • Structures capable of withstanding up to F5 tornado wind forces and high velocity kinetic impacts 
  • Earthquake engineering
  • Fire resistant structures
  • Fire suppression and air evacuation systems
  • Underground structures
  • Backup power and communication systems
  • Volcanic ash filtration systems
  • Air supply and filtration systems
  • Water supply and/or storage solutions
  • Sanitation and waste management
  • Radon gas mitigation
  • HVAC and Comfort systems
  • Hardened and blast resistant engineering
  • Basement conversions and additions
  • Above ground hardened structures
  • Emergency escape and egress
  • Long term survivability planning and stocking
  • Entertainment and “creature comforts” 


Panic Room.

Panic rooms, or safe rooms, are designated areas within a home or building that are hardened to resist an attack. Panic Rooms can simply be a converted closet meant to provide a safe place until law enforcement or other help arrives, to elaborate rooms designed to provide long term protection. Typically panic rooms are intended as a place to hide until help can arrive and they are hardened to resist an invading force, such as a home invasion scenario.

The levels of protection can range from basic to very high depending on what your requirements are. A basic level panic room would be a room with heavier wall construction and a security door that would make it very difficult for someone to break into. A high level panic room would be virtually impossible to break into, would provide ballistic and fire protection, audio and visual surveillance, and communication capability outside the building. A high level room would also typically be designed to house the occupants for a longer period of time with a restroom, beds, food, and water. 

Any room in the house, or the entire house, can be retrofitted to provide panic room level security. An ideal room to convert into a panic room is the master bedroom since most mater bedroom suites have a bathroom attached, and furniture including a bed. 


Building Envelope and Construction Methods

There are a number of options for retrofitting existing structures and rooms to harden them against attack and to provide ballistic protection from bullets or other high velocity objects. 

New construction offers the most versatility and options for designing a hardened structure. From a design-build approach, the entire structure can be designed from the ground up to meet security, ballistic, fire, and other serious threat requirements. 


Professionally Designed Bunkers

Why is this important? If you are building an underground shelter, there are many critical factors to consider in the construction process.

The weight of the earth. You don’t want your shelter to collapse on you. This also includes seismic forces created by earthquakes, volcanic eruptions, and nuclear detonations. If you do not want your shelter to become your tomb, then it is important that it is properly engineered and constructed.

Water. Ground water, drainage, and water proofing are critical elements of designing an underground structure that won’t allow water and moisture to destroy your interior space, your belongings, grow mold or mildew, or damage the structure itself. 

Radon. Radon is a radioactive gas that is naturally emitted from the earth. There are numerous studies on this naturally occuring gas that emits from the earth. Some regions have more radon than others. Some studies show that there is no significant risk from radon, while other studies say that risk exists. Radon mitigation is often very expensive and it is up to you to decide if you need or want it. 

Escape and Egress. If your primary access point is compromised or destroyed, you need to have another way out or your shelter will become your tomb. ‘Nuff said.

Ventilation. This is an extremely critical component and one often overlooked by DIYs looking to build their own underground shelter. We all need oxygen to survive. More than that, you need clean fresh air to survive and remain healthy. Properly designed ventilation and filtration systems are critical to any hardened structure to keep the air clean, fresh, and breathable, especially in the case of a NBC or volcanic event.

Sustainable. If you plan to remain locked up in your bunker for any length of time, even if just a few hours, it needs a sustainable design. Water supply, food, sanitation, heating and cooling, ventilation, and electricity are all critical to a sustainable and survivable design.

Camouflage. When designing an above or below ground shelter or bunker, there are certain features that you do not want to advertise to the public. Air filtration and intake and exhaust pipes are usually a dead giveaway of an underground bunker if someone knows what to look for.

Hidden Access and Egress points. You may not want anyone to know where your bunker or shelter access and exit points are. In fact, it’s probably best that no one outside your circle of trust know about it. There are any number of creative, subtle, and unusual ways to conceal access and exit points to your shelter and security systems. Secondary and tertiary access/egress locations away from your primary access point are important to conceal from discovery. 

Long Term Solutions.  There are many factors to consider when developing a long term shelter-in-place plan. Air, food, water, and sanitation are the primary factors. But also creature comforts such as entertainment and atmosphere. Other factors are power, fuel, and outside communications.


Wine Cellars.

Wine Cellars are the perfect camouflage for an underground shelter or bunker. Easily providing multiple hidden access points through the creative design of cabinetry, stone veneers, and wall racks. Beyond providing access to a hidden bunker, wine cellars can create an atmosphere of warmth and luxury to entertain guests or show off your collection.



Vaults can be custom designed to any size and for any purpose. Most vaults are walk-in type vaults built with reinforced concrete and a vault door that is encased in the concrete wall, making it virtually impossible to break into without special equipment. 

Vaults can be built to be fireproof, blast resistant, and incorporate high tech security systems such as biometric access, video surveillance, and remote monitoring.

Vaults can also double as panic rooms in an emergency and can be designed with all the same elements of a panic room. 


Basement Conversions.

Basements are ready made shelters and already a part of your house. With a little modification, a basement can be converted into a hardened shelter or bunker capable of providing protection against the most common threats likely to occur such as home invasions or severe storm threats.

Basements can also be completely finished into a fully functional extension of the home to accommodate any desired activity. Ideas include Man/Lady Caves, entertainment or game rooms, spare bedrooms, office rooms, cocktail bar and lounge, and more.


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