Ballast #246

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Yong Jae Kim

January 23, 2019 07:01

#246. An architect receives a soil report indicating the possibility of hydrostatic water problems surrounding a basement foundation. What construction techniques or materials should the architect consider using (Choose the four that apply)?

a) dampproofing membrane

b) geotextiles

c) gravel fill below the floor slab

d) pervious paving around the building

e) positive slop away from the building

f) sump pump

the answer is b) c) e) and f). I understand all answers, but I don't understand why a) can not be an answer. Can anybody explain it for me?

Thank you!

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  Michael Lawson January 23, 2019 13:22

  I think a) doesn't qualify in this question because it doesn't relieve the hydrostatic pressure, while the others would help relieve, reduce, or revert the pressure away from the foundation. Hope this helps! 

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  David Kaplan January 23, 2019 13:53

  ^^this is correct above.  Dampproofing is sort of like a "minimal waterproofing" approach.  You'd use that when there's maybe a small amount of water penetration issue but not something as grand as hydrostatic pressure.  In that instance, you'd do waterproofing - more intense and stronger.

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  Yong Jae Kim January 23, 2019 17:59

  got it. thank you!

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  Tony Young January 24, 2019 16:35

  I came across this test question and was puzzled too as into why damp proofing wasn't a correct choice thanks!

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  gdpresilla August 12, 2020 16:08

  Damproofing is for moisture not water penetration, it should be waterproofing in order to be effective

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  vmiller89 August 26, 2023 00:39

  What about adding a perforated pipe around the perimeter of the basement wall?

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