Industrial-Grade Underground Bunkers & Survival Shelters.
When your family’s safety is on the line, you need more than a basic shelter. You need the same proven engineering that protects America’s critical infrastructure. Mass Tank brings over a century of underground storage expertise to residential bunker construction, delivering unmatched protection with the comfort your family deserves.
Why Choose Mass Tank for Your Underground Bunker?
Unlike companies that only build bunkers, Mass Tank has been engineering underground structures for over 100 years. We’ve protected everything from municipal water supplies to industrial facilities. Now we bring that same expertise to protect your family.
Proven Track Record
Thousands of underground installations
Engineering Excellence
ASME pressure vessel certification
Quality Materials
Military-grade steel construction
Professional Installation
Certified crews, not contractors
Lifetime Support
Inspection, maintenance, and upgrade services
Design Your Custom Underground Bunker
Built to Your Exact Specifications. Every Mass Tank bunker is custom-engineered for your specific needs, location, and threat assessment. No two installations are identical.
Underground Bunker Size & Depth Options
Our compact bunkers range from 200-500 sq ft and comfortably accommodate 2-4 people, perfect for couples or small families seeking essential protection. The family size option provides 500-1,200 sq ft of space for 4-8 people, offering room for comfortable living areas and essential amenities. For larger households, our extended bunkers span 1,200-2,500 sq ft and house 8-15 people with multiple rooms and expanded facilities. Community bunkers exceed 2,500 sq ft and can accommodate 15+ people, ideal for extended families or neighborhood groups planning together.
Our standard installations place bunkers 8-12 feet underground, providing excellent protection while minimizing excavation costs. For maximum security, deep installation options extend 15-25 feet below ground, offering superior protection from blast effects and radiation. We also engineer custom depths specifically for your site conditions, taking into account soil type, water table, and local regulations.
Superior Construction Standards
Every Mass Tank bunker begins with 1/4″ minimum American-made steel plate, providing exceptional structural integrity and corrosion resistance. Structural I-beams positioned at 24″ centers create an incredibly strong framework that distributes loads evenly across the entire structure. Our galvanized steel air intake systems resist corrosion in underground environments, while bullet-resistant hardened steel doors provide the ultimate barrier against forced entry.
Protection Features: The L-Shaped Entrance design is crucial for preventing radiation infiltration, as it blocks direct pathways that could allow harmful radiation to enter your shelter. Our Waterproof Sealing systems make these bunkers suitable for installation even in high-water-table areas, ensuring your shelter remains dry and habitable. Advanced Structural Engineering calculations ensure each bunker withstands soil loads and external forces that could compromise lesser-built structures. Quality welding, using ASME-certified procedures, guarantees that every seam and joint meets the highest industry standards for pressure vessels.
Bunker Add-ons & Systems
Air Filtration
NBC (Nuclear, Biological, Chemical) systems are available for ultimate protection against airborne threats. We use European-manufactured components from trusted brands like ANDAIR, Bethel, and Temet, known for their reliability in critical applications. Our systems provide 50% greater air capacity than standard systems, ensuring adequate ventilation even under stress. The 6″ galvanized steel intake pipes deliver superior airflow, while positive pressure ventilation keeps contaminants from entering through any potential gaps.
Power Systems
Backup generators with automatic transfer switches ensure your bunker maintains power during grid failures. Redundant electrical systems provide multiple power paths, so if one system fails, backup systems immediately take over. Solar power integration is available for sustainable, off-grid operation, while battery backup systems store energy for extended outages. All electrical components feature EMP-protected designs to maintain functionality even after electromagnetic pulse events.
Water & Plumbing
Independent water storage and purification systems ensure clean drinking water regardless of outside conditions. Greywater processing systems recycle and treat wastewater, extending your water supplies and reducing waste. Full bathroom facilities include toilets, sinks, and showers for comfort during extended stays. Hot water systems provide the comfort of warm showers and heated water for cooking and cleaning. Emergency water reserves give you additional backup supplies for extended emergencies.
Bunker Installation Process
Our certified installation teams handle every aspect of your bunker project from start to finish.
Phase 1: Design & Planning
Phase 2: Fabrication
Phase 3: Installation
We fully install, test, and provide support to keep your bunker in great shape.
Certifications to Ensure Our Products and Services Meet the Highest Expectations
High-quality products and safety are our highest priorities. We’ve received all the highest certifications to ensure you get the best products and experiences.
Get in Touch
If you have any questions about Mass Tank’s designation, or if we can partner on any projects, please don’t hesitate to reach out!
