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The thickness of a thatch roof covering should be at least ___________

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The thickness of a thatch roof covering should be at least ___________

(a) 5 cm

(b) 7 cm

(c) 10 cm

(d) 15 cm

The question was posed to me in unit test.

My question comes from Roof Coverings for Pitched Roofs topic in section Roofing Materials of Construction & Building Materials

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Best answer
The correct option is (d) 15 cm

Explanation: The thickness of a thatch roof covering should be at least 15 cm. It consists of bundles of straw or reeds. Generally, a straw thatch can last for about 20 years and a reed thatch can last for about 60 years.

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