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_________ is a flexible material which is commonly used for the damp proofing.

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_________ is a flexible material which is commonly used for the damp proofing.

(a) Hot bitumen

(b) Bituminous felts

(c) Mastic asphalt

(d) Metal sheets

This question was posed to me in an interview.

Origin of the question is Components in section Important Building Components of Construction & Building Materials

1 Answer

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Correct answer is (a) Hot bitumen

For explanation: Due to its physical nature, hot bitumen remain flexible even after cooling and it is placed on the bedding of concrete or mortar. This material should be applied with a minimum thickness of 3 mm. Whereas Mastic Asphalt is a semi rigid material and it forms and excellent impervious layer for damp proofing.

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