Although concrete is porous, water doesn't directly enter the room for several reasons:
1. Surface tension:- Water has a natural surface tension that prevents it from easily penetrating the concrete pores.
2. Hydrophobic properties:- Concrete contains hydrophobic (water-repelling) materials like cement and aggregate, which resist water absorption.
3. Capillary action:- While concrete pores can absorb water, the capillary action is limited, and water doesn’t readily flow through the pores.
4. Water-repellent treatments:- Many modern concrete structures are treated with water-repellent coatings or admixtures, reducing water absorption.
5. Building design:- Buildings are designed with features like overhangs, gutters, and downspouts to direct rainwater away from the structure.
However, during heavy or prolonged rainfall, water can eventually seep through the concrete pores, especially if:-
1. The concrete is of poor quality or has deteriorated over time.
2. The building design or construction is flawed.
3. The water pressure is too great (e.g., due to flooding or clogged drains).
To prevent water ingress, buildings often incorporate additional protection measures like:
1. Waterproofing membranes or coatings.
2. Drainage systems and waterproofing details.
3. Regular maintenance and inspections.
Keep in mind that even with these measures, water can still enter the building through other means, like doors, windows, or plumbing fixtures.
