The home sits on a site with a variable water table, where moisture intrusion and hydrostatic pressure are of concern.
Which of the following is the most effective method for creating a waterproof basement? The correct answer:
A. Placing perforated drain tile around the foundation, above the concrete footing
Why it’s above the concrete footing? If the variable water table exits, shouldn’t the perforated drain level with the footing? It requires min of 2" from the bottom of the pipe to the top of the footing based on BCI.
C. Placing a course of gravel beneath the foundation pour.
To support the footing, shouldn’t it be compact?
Thank you for answering my questions : )