A commonly used foundation drainage system consists of
A) a perforated drain pipe set within a layer of crushed stone or gravel, the layer wrapped with a filter fabric.
B) a perforated drain pipe.
C) a perforated drain pipe wrapped with filter fabric and set within a layer of crushed stone or gravel.
D) a perforated drain pipe set within a layer of crushed stone or gravel.
E) any one of the above.
A) a perforated drain pipe set within a layer of crushed stone or gravel, the layer wrapped with a filter fabric.
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What will be an ideal response?
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