Original Volcanic Hollow Block – Size 20 (Kasvol HollowBlock 3-20)

Optimal Balance of Strength, Efficiency, and Value.

The Original Volcanic Hollow Block – Size 20 (Kasvol HollowBlock 3-20) is a versatile, high-performance building solution engineered for a wide range of construction applications. This premium 40×20×20 cm block features a strategic 3-core hollow configuration that delivers reliable compressive strength (6 MPa), effective thermal performance, and superior acoustic insulation (54 dB) – all in a lightweight, easy-to-handle design. With its optimized core geometry and durable volcanic composition, it offers builders, contractors, and developers the perfect balance of performance, efficiency, and cost-effectiveness for residential and commercial projects across Saudi Arabia and the Gulf region.

• 3-Core Hollow Design Strategic core placement optimizes strength-to-weight ratio for versatile construction applications.
• Lightweight Construction At only 12 kg per block, installation is faster, easier, and more cost-effective – reducing labor costs and construction timelines.
• Reliable Strength 6 MPa average compressive strength ensures dependable performance for a wide range of applications.
• Exceptional Sound Resistance 54 dB acoustic performance creates quieter, more peaceful indoor environments – ideal for homes, offices, and hotels.
• 6-Hour Fire Resistance Exceptional fire protection enhances building safety and provides critical evacuation time.
• Material Efficiency 3-core design reduces raw material consumption without compromising performance.
• Utility Integration Cores can accommodate electrical conduits and plumbing – simplifying installation.
• Durable Volcanic Material Natural volcanic aggregates ensure long-lasting performance, resisting weather, moisture, and temperature extremes.
• Versatile Finishes Available in rough (for plastering) or smooth (for exposed walls) to suit project requirements.
• Cost-Effective Optimized design delivers excellent value for general construction needs.
• Eco-Friendly Made from sustainable, natural materials with efficient resource utilization.

• Exterior Walls Reliable building envelope with effective thermal performance for residential and commercial projects.
• Interior Partition Walls Lightweight, acoustically superior (54 dB) division of interior spaces.
• Residential Construction Ideal for villas, apartment complexes, and housing developments.
• Commercial Buildings Suitable for offices, retail spaces, hotels, and institutional facilities.
• Multi-Story Construction Reduced weight (12 kg) lessens structural load on frameworks.
• Acoustically Sensitive Areas 54 dB sound resistance near highways, schools, and urban centers.
• Utility-Rich Environments Easy integration of electrical and plumbing systems through 3-core design.
• Renovation Projects Lightweight design ideal for upgrading existing structures.
• Climate-Sensitive Environments Effective for regions with moderate temperature variations.

1. Natural Strength
Volcanic aggregates are inherently durable, providing reliable compressive strength and long-term performance that synthetic materials cannot match.

2. Built-In Insulation
Unlike conventional concrete blocks, volcanic blocks offer natural thermal and acoustic insulation – reducing or eliminating the need for additional insulation layers.

3. Lightweight Advantage
With dry density as low as 500 kg/m³ and weight of just 12 kg per block, these are significantly lighter than traditional blocks, making them exceptionally easy to handle, transport, and install.

4. Fire Resistance
Volcanic materials are non-combustible, providing up to 6 hours of fire protection – a critical safety feature for any building.

5. Climate Suitability
Engineered specifically for the Gulf region, volcanic blocks perform exceptionally well in extreme heat, humidity, and harsh weather conditions.

6. Cost Efficiency
Faster installation, reduced labor, and lower material costs make volcanic blocks a smart economic choice for any project scale.

7. Acoustic Excellence
With 54 dB sound resistance, volcanic blocks create quieter, more comfortable indoor environments.

8. Design Flexibility
Available in various core configurations and finishes to suit project requirements.

Building Responsibly for a Better Future

At Kasvol, sustainability is at the heart of everything we do. The HollowBlock 3-20 Volcanic Block reflects our commitment to environmentally responsible construction:

• Natural Materials Made from abundant, locally sourced volcanic aggregates.
• Material Efficiency 3-core hollow design uses less raw material while maintaining performance.
• Lightweight Design At only 12 kg, lower transportation emissions due to reduced weight.
• Durability Long lifespan minimizes replacement cycles and construction waste.
• Non-Toxic Made from safe, natural materials with no harmful emissions.
• Local Manufacturing Proudly produced in Saudi Arabia, reducing import-related emissions.
• Recyclable Volcanic blocks can be crushed and reused as aggregate at end of life.

Green Building Compatibility:
The HollowBlock 3-20 contributes to green building certification points through:

• Material efficiency – optimized 3-core design
• Energy performance – improved thermal insulation
• Acoustic comfort – 54 dB sound resistance
• Recycled content – natural aggregates
• Regional materials – locally manufactured
• Low-emitting materials – non-toxic composition

• Premium volcanic aggregate selection
• Precision 3-core configuration
• 6 MPa compressive strength verification
• Tested for acoustic performance (54 dB)
• Rigorous quality control throughout production
• Tested for fire resistance (6 hours)
• Consistent finish quality
• 14+ years of refined production expertise