The Strength Test: Manual Blocks, Machine Blocks, and CIEBs Compared

Strength is one of the most important factors in choosing a building material. A weak block can’t hold weight, cracks under pressure, and allows water to seep in — leading to mould and constant repairs. Let’s look at how the three options compare.

Manual Cement Blocks

  • Low compressive strength → Many manual blocks in The Gambia fail basic strength tests.
  • High porosity → absorbs rainwater, leading to damp walls.
  • Erosion → rain splash can wear away the surface in just a few years.

Example: A wall made of manual blocks often develops cracks after its first or second rainy season.

Machine-Made Cement Blocks

  • Medium to high strength → better compaction means blocks carry heavier loads.
  • Lower porosity than manual blocks but still absorbs moisture.
  • More consistent durability → houses last longer with fewer cracks.

Example: A well-made machine block wall can withstand storms better, with less visible damage.

CIEBs (Eco Interlocking Blocks)

  • High compressive strength → meets or exceeds international building standards.
  • Low water absorption → walls stay dry and mould-free.
  • Self-aligning → interlocking design ensures stability without relying heavily on mortar.

Example: CIEB-built homes in humid climates like Asia and Africa have lasted decades without significant mould or water damage.

The Verdict

stylus

Manual blocks

Manual blocks are the weakest.

Machine-made

Machine-made blocks are a step up in quality.

CIEBs

long-term solution for strength, durability, and comfort.