- Tiny Holes: Cement blocks are full of microscopic pores and air gaps.
- Water Pathways: These pores act like sponges, drawing in rainwater and humidity.
- Result: Walls stay wet for long periods, creating perfect conditions for mould, algae, and structural weakening.
Porosity Explained
Why Cement Blocks Absorb So Much Water
One of the most common complaints homeowners have about cement block houses in The Gambia is damp walls, peeling paint, and mould. The root cause? Porosity. But what does that mean, and why are cement blocks so prone to soaking up water?
What Is Porosity?
Why Cement Blocks Are So Porous
- Low compression during production.
- Poor sand-to-cement ratios.
- Lack of proper curing.
- Exposure to rain without protective finishes.
The Consequences
- Walls that never fully dry.
- Ugly black stains from mould and algae.
- Weakening of plaster and paint.
- Increased maintenance costs.
The Better Alternative: Eco Interlocking Earth Blocks
CIEBs are pressed under high pressure, making them denser and less porous than cement blocks. Their reduced reliance on mortar joints further limits water entry points. This means walls built with CIEBs stay drier, healthier, and more durable in The Gambia’s humid climate.
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Practical Tip
If you’re building with cement blocks, always apply a water-resistant plaster or breathable exterior paint. For a long-term solution, consider CIEBs, which naturally resist water absorption.
Porosity may be invisible, but its effects are obvious — damp walls, mould, and ongoing repairs. Eco Interlocking Earth Blocks offer a reliable solution, combining strength with water resistance.
Build with Eco Bricks
Enjoy walls that stay dry and strong year-round.