Foundation drain system

A drainage system for providing fluid drainage for a foundation that is cast by placing concrete between an outside-form-wall and an inside-form-wall, comprising:

• a drainage mat essentially flush with the outside of the foundation;
• at least one through-conduit in fluid communication with said drainage mat and extending through the foundation to communicate with conventional means for drainage;
• and
• wherein said drainage mat has a biodegradable resistant back with dimpled core and a face of biodegradable resistant filter fabric that is porous to water, but not soil particles.

A drainage system for providing fluid drainage for a concrete foundation that has a top, a bottom, and an outward-looking-face having an essentially flat surface, comprising:

• a drainage mat, having an outward-looking-face, recessed into part of the outward-looking-face of the foundation such that said mat's outward-looking-face does not extend significantly outward of the essentially flat surface of the outward-looking-face of the foundation;
• at least one through-conduit in fluid communication with said drainage mat and extending through the foundation to communicate with conventional means for drainage;
• wherein said drainage mat further has a back and a top;
• and
• wherein said mat's outward-looking-face is porous only to fluid.

A method of providing fluid drainage for a foundation that is cast by placing concrete between an outside-form-wall and an inside-form-wall, comprising, after the form walls are erected, the steps of:

• placing a drainage mat, having a face and a back, against the inside of the outside-form-wall extending along the length of the outside-form-wall;
• attaching the proximate end of at least one through-conduit in fluid communication with said drainage mat and extending the distal end of said through-conduit to be flush with the inside of the inside-form-wall;
• placing concrete between the outside-form-wall and the inside-form-wall;
• allowing said concrete reasonably to cure, whereby the foundation results;
• removing the outside-form-wall and the inside-form-wall;
• attaching conventional means for drainage to the exposed distal end of said at least one through-conduit;
• placing aggregate next to said drainage mat;
• and
• backfilling the foundation.

A drainage system for providing fluid drainage for a foundation that is cast by placing concrete between an outside-form-wall and an inside-form-wall, comprising:

• a drainage mat essentially flush with the outside of the foundation;
• at least one through-conduit in fluid communication with said drainage mat and extending through the foundation to communicate with conventional means for drainage;
• wherein said drainage mat has a face and is capable of importing fluid through said mat's face while communicating said fluid longitudinally;
• and
• wherein said drainage mat is surmounted with part of the foundation's concrete.