Block wall system

A concrete wall top block of uniform composition comprising:

• a face section, said face section having first and second ends, said face section also having rear, front, top and bottom surfaces, a support section, said support section having a height less than said face section, said support section and said rear surface of said face section defining a vertical channel, said channel extending the entire height of said support section, said support section having first and second ends and a longitudinal length from said first end to said second end less than the longitudinal length from said first end to said second end of said face section, said support section having its bottom. Surface flush with the bottom surface of said face section, said support section joined to said face section along the longitudinal length of said face section, said support section parallel to said face section, said first end of said support section flush with said first end of said face section, a horizontal extension, said horizontal extension extending from said first end of said support section wherein said first end of said face section, said first end of said support section and said horizontal extension complement a second end of an adjacent wall top block.

A foundation wall system for a building comprising:

• a base, at least first and second pre-cast concrete top wall blocks of uniform composition positioned to complement one another on said base, each of said wall blocks comprising a face section, said face section having rear, front, top, bottom, and first and second side surfaces, said front surface defining a notch along the top edge, said notch having a horizontal and a vertical surface, a relatively short support section, said support section having rear, front, top, bottom, and first and second side surfaces, said support section defining a vertical channel, said channel extending the entire height of said support section, the longitudinal length of said support section of each of said blocks being less than the longitudinal length of said face section, said front surface of said support section joined to the rear of said face section, said first side surface of said support section flush with said first side surface of said face section, a horizontal extension, said horizontal extension having a depth less than the depth of said support section, said horizontal extension extending from said first side surface of said support section, wherein said second side surfaces of said second block are complementally received by the first side surfaces of said adjacently positioned first block.