• Makiga Interlocking Soil Blocks (ISSBs): These are compressed blocks made from a mixture of soil, a small amount of cement (5-10%), and water. Produced using manual or hydraulic presses from Makiga Engineering, ISSBs feature an interlocking design that eliminates the need for mortar in most parts of the structure.
• Ndarugo Stones: These are natural quarry stones mined in Juja, Kiambu County, and machine-cut into uniform sizes (typically 6×9 or 9×9 inches). They’re widely used in Kenya for walling and foundations due to their strength and availability.

1. Cost-Effectiveness: Save More with Makiga ISSBs

• Lower Material Costs: ISSBs are made from locally sourced soil, which is often free or inexpensive, mixed with a minimal amount of cement. Ndarugo stones, on the other hand, require quarrying, cutting, and transportation from Juja to your site, driving up costs significantly. For example, a 6×9 Ndarugo stone can cost Ksh 25-30 per piece, and a lorry load of 1,000 pieces might set you back Ksh 25,000 or more, excluding transport.
• Reduced Labor Costs: The interlocking design of Makiga blocks eliminates the need for mortar between most joints, cutting down on cement, sand, and skilled labor expenses. Building with Ndarugo stones requires extensive mortar use and skilled masons to ensure proper alignment, adding to the overall budget.
• On-Site Production: With a Makiga press machine, you can produce ISSBs directly at your construction site, avoiding transportation fees entirely. Ndarugo stones, however, must be hauled from the quarry, with transport costs varying based on distance (e.g., Ksh 5,000-15,000 per trip).

2. Sustainability: Eco-Friendly Building with ISSBs

• Makiga ISSBs: These blocks are an eco-friendly choice, utilizing locally available soil and requiring minimal cement. They don’t involve deforestation, excessive mining, or high-energy processes like quarrying. The production process has a low carbon footprint, aligning with Kenya’s push for sustainable housing.
• Ndarugo Stones: Quarrying Ndarugo stones has a significant environmental impact. Mining disrupts landscapes, contributes to soil erosion, and increases carbon emissions due to heavy machinery and transportation. The process also depletes natural stone reserves, making it less sustainable in the long term.

3. Ease of Installation: Faster Builds with Less Expertise

• Makiga ISSBs: The interlocking mechanism allows blocks to fit together like puzzle pieces, requiring minimal skill to assemble. Even individuals with little construction experience can build sturdy walls quickly. The lightweight nature of ISSBs (compared to concrete blocks) also makes them easier to handle.
• Ndarugo Stones: While machine-cut Ndarugo stones are uniform and easier to work with than rough stones, they still require skilled masons to apply mortar, level the stones, and ensure structural integrity. This process is time-consuming and labor-intensive.

4. Durability and Strength: Built to Last

• Makiga ISSBs: When properly stabilized with cement, ISSBs are incredibly strong, resistant to weather, pests, and fire. Their durability has been proven in various climates across Kenya, from rural homes to urban schools. The interlocking design also enhances structural stability by distributing loads evenly.
• Ndarugo Stones: These stones are undeniably strong and durable, making them a reliable choice for foundations and load-bearing walls. However, their porous nature can lead to water seepage if not properly sealed, potentially weakening mortar joints over time.

5. Versatility: Adaptable Designs with ISSBs

• Makiga ISSBs: Available in straight, wide, and curved variations, ISSBs can be used for everything from homes and schools to water tanks and retaining walls. The curved blocks, in particular, enable innovative designs like circular structures, which are harder to achieve with Ndarugo stones.
• Ndarugo Stones: While excellent for straight walls and foundations, Ndarugo stones are less adaptable for curved or unconventional designs due to their rigid shape and reliance on mortar.

6. Thermal and Energy Efficiency

• Makiga ISSBs: These blocks have high thermal mass, meaning they retain heat in cooler months and stay cool during hot seasons. This reduces the need for artificial heating or cooling, lowering energy costs over time.
• Ndarugo Stones: While stone walls can also regulate temperature, their performance depends heavily on thickness and insulation. Without proper plastering or additional layers, they may not match the thermal efficiency of ISSBs.

Final Thoughts: Why Choose Makiga Interlocking Soil Blocks?