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Q: Which one of the following is not an advantage for cavity walls over other walls?
  • A. The nuisance of efflorescence is very high.
  • B. It is good insulation against sound.
  • C. It is cheaper and economical.
  • D. Loads on foundations are reduced.
Correct Answer: Option D - Cavity wall– Cavity wall are most common external wall which is constructed with two separate walls for single wall purpose with some space or cavity between them. Advantage of cavity wall– • Used for moisture prevention • Used for heat insulation • It is used for sound insulation • It is cheaper and economical
D. Cavity wall– Cavity wall are most common external wall which is constructed with two separate walls for single wall purpose with some space or cavity between them. Advantage of cavity wall– • Used for moisture prevention • Used for heat insulation • It is used for sound insulation • It is cheaper and economical

Explanations:

Cavity wall– Cavity wall are most common external wall which is constructed with two separate walls for single wall purpose with some space or cavity between them. Advantage of cavity wall– • Used for moisture prevention • Used for heat insulation • It is used for sound insulation • It is cheaper and economical