Question:
Cavity Walls are used for
Cavity Walls are used for
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A cavity wall has an air gap between two leaves of masonry.
Updated On: Nov 12, 2026
- Waterproofing
- Heat Insulation
- Aesthetics
- Cost saving
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
A cavity wall consists of two leaves of masonry separated by an air gap (cavity).
The still air in the gap resists heat flow and so gives thermal insulation (it also reduces sound transmission and stops dampness from crossing to the inner leaf).
Among the given options, the primary purpose is heat insulation; it is not mainly for aesthetics or cost saving, and the cavity only prevents moisture crossing rather than waterproofing the wall itself.
Answer: (2) Heat Insulation
The still air in the gap resists heat flow and so gives thermal insulation (it also reduces sound transmission and stops dampness from crossing to the inner leaf).
Among the given options, the primary purpose is heat insulation; it is not mainly for aesthetics or cost saving, and the cavity only prevents moisture crossing rather than waterproofing the wall itself.
Answer: (2) Heat Insulation
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