These include lime-based plasters, silicate paints, and some eco-friendly renders. They allow moisture vapor to pass through without soaking in liquid water.
How Breathable Finishes Help Walls Stay Dry and Strong
One of the biggest issues with cement block construction is moisture retention. Breathable finishes provide the balance between keeping water out and letting trapped vapor escape.
What Are Breathable Finishes?
Why Breathability Is Crucial
Without breathability, any water that enters the wall (through cracks or rising damp) gets stuck inside. This trapped moisture eventually causes mould, bubbling paint, or even wall deterioration.
Traditional vs. Modern Solutions
- Traditional: Lime plaster has been used for centuries in humid climates. It naturally resists mould and allows walls to dry.
- Modern: Mineral or silicate paints provide similar benefits while being longer-lasting and more durable.
Health Benefits
Walls that “breathe” reduce indoor humidity and prevent mould spores from building up inside homes — a key health advantage, especially for families with children or asthma sufferers.
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Practical Tip
If you can’t afford specialised breathable finishes, even a well-mixed sand-cement render with a quality exterior paint is far better than leaving walls bare.