Low-Cost Green Home


RASTRA ICFs vertical and horizontal
Photos courtesy of RASTRA

RASTRA, a unique brand of Composite Insulating Concrete Form (ICF), makes concrete panels of 85% recycled expanded polystyrene (EPS) and 15% cement. A standard panel is up to 10 feet long, 15 or 30 inches wide, and 8.5 to 14 inches thick. The EPS content gives a RASTRA panel light weight and high insulating value; structural strength comes from rebar and concrete that are inserted through vertical and horizontal channels built into the panel's shape. When the inserted concrete hardens around the rebar, it forms a strong, interlocking gridwork. The combination of vertical and horizontal channels allows RASTRA panels to be placed either horizontal, usually for straight walls, or vertical, which simplifies curved walls. Pre-fab, complete walls up to 25 feet long are also available.

lightweight RASTRA ICF panels

Advantages of RASTRA:

Below is a house that makes great use of vertical RASTRA panels formed into curved walls.

For much more information, see RASTRA.

finished RASTRA ICF house