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Underground Bunker

Services we offer

GMC – India's trusted manufacturer of blast-resistant underground home bunkers and civilian shelters. M35–M70 grade concrete. Serving homeowners, corporations & NGOs across India. consultation available.

Specifications
Concrete Grade: M35 – M50

Blast Overpressure Rating: Up to 45 psi

Capacity: 2 to 50 persons

Air System: HEPA Filtration

Occupancy Duration: 30–90 day self-sufficient rated

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Underground Home Bunkers

Headline: Underground Home Bunkers

Description:

Discreet, blast-resistant underground shelters built beneath residential properties across India. Whether you need a compact single-room survival unit or a fully furnished multi-room family shelter, GMC engineers a solution that fits seamlessly into your existing property with minimal surface disruption.

Specifications:

Concrete Grade: M35 – M50

Blast Overpressure Rating: Up to 45 psi

Capacity: 2 to 50 persons

Air System: HEPA Filtration

Occupancy Duration: 30–90 day self-sufficient rated

Civilian Shelters

Full-spectrum shelters engineered to protect against threats. Built with high-density reinforced concrete walls, blast doors, and pressurized air filtration systems — providing complete protection for extended periods underground.

Specifications:

Concrete Grade: M50 – M70

Wall Thickness: 300mm – 600mm

Steel Reinforcement: Fe-500 HYSD Bars

Corporate & NGO Bunkers

Large-scale underground facilities designed for Indian businesses, industries, and disaster relief organizations. GMC builds hardened continuity-of-operations centers with secure communications infrastructure, medical bays, command rooms, off-grid power and water systems — keeping your people and operations protected and functional during any crisis.

Specifications:

Concrete Grade: M45 – M60

Capacity: 50 to 500+ persons

Power: Solar + Diesel Generator Backup

Water: Integrated Storage System

Why Choose GMC for Your Underground Shelter?

Our in-house raw materials expertise sets us apart from every other bunker manufacturer in India.

Point 1: In-House Raw Materials

GMC manufactures and grades its own silica sand and fine aggregates at our Gujarat plant. This means tighter quality control over every cubic metre of concrete that goes into your shelter — from the quarry to the finished wall.

Point 2: High-Grade Reinforced Concrete

We use M35 to M70 grade concrete with Fe-500 HYSD steel bars, providing blast and seismic resistance far beyond standard construction norms.

Point 3: Certified Air Filtration

Every shelter includes a certified air filtration system, providing clean breathable air.

Point 4: Complete Privacy

Your bunker location and project details are never recorded or shared. Every GMC project is protected by a strict non-disclosure agreement, and all staff undergo thorough background verification before project assignment.

Point 5: End-to-End Project Delivery

From site survey and structural design to excavation, construction, waterproofing, systems installation, and final handover training — every phase is managed in-house from our Vadodara base.

OUR PROCESS SECTION

Section Label: How It Works

Headline:

Your GMC Bunker in 5 Simple Steps

Step 1 — Paid Consultation

Threat profile assessment, site survey, and capacity planning with our senior engineers. Fully confidential and no-obligation.

Step 2 — Custom Design

Structural engineering drawings and a bespoke floor plan prepared specifically for your site conditions and protection requirements.

Step 3 — Excavation

Precision excavation and site preparation by our certified crews, with minimal disruption to your existing property or surroundings.

Step 4 — Construction

High-grade concrete pour, steel reinforcement installation, blast door fitting, air system, waterproofing, and full interior fit-out.

Step 5 — Handover

Full commissioning, systems testing, and hands-on operational training for you, your family, or your team.

GMC MATERIALS ADVANTAGE SECTION

GMC is uniquely positioned as both a raw material manufacturer and a bunker builder — a combination no competitor can match in India.

Material 1: Graded Silica Sand

Our in-house processed silica sand ensures consistent particle size and chemical purity — both critical for achieving target concrete mix strengths of M50 to M70 used in shelters.

Material 2: Quality River Sand

Processed at our Survey No. 397, our river sand delivers the ideal fine aggregate for high-performance reinforced concrete bunker structures.

Material 3: Construction Chemicals

We supply and use our own waterproofing compounds, superplasticizer admixtures, and bonding agents — ensuring bunker walls and slabs are simultaneously blast-resistant and fully waterproof.

Material 4: Epoxy Coatings

Our epoxy application expertise provides interior and exterior corrosion-resistant coatings that protect reinforced steel and extend the operational life of underground structures by decades.