A METHOD AND APPARATUS ARE PROVIDED BY WHICH CONCRETE OR SIMILAR CASTABLE MATERIAL CAN BE FORMED IN A VERTICAL STACK USING A SINGLE FRAME. THE INITIAL SLAB OR FORM IS POURED ONTO A PLATFORM WITH OR WITHOUT RE-ENFORCING STEEL LYING THEREON. WHEN THE INITIAL SLAB HAS BEEN POURED WITHIN THE SURROUNDING FRAME OR MOLD AND AT LEAST PARTIALLY SET, THE FRAME IS ELEVATED A PREDETERMINED DISTANCE, A SUITABLE BOND BREAKING AGENT SUCH AS, FOR EXAMPLE, A CARBOARD SHEET, HAVING THE APPROXIMATE DIMENSIONS OF THE PREVIOUS SLAB, IS PLACED OVER THE TOP OF THE LATTER, RE-ENFORCING STEEL PLACED THEREON AND THE CONCRETE POURING STEP REPEATED. THE FRESHLY POURED CONCRETE IS SMOOTHED OUT BY THE USE OF VIBRATORS, TROWELS AND LEVELING BARS. THE CASTING FRAME MAY BE SO CONSTRUCTED AS TO FORM TWO OR MORE MOLDED FORMS WHILE SAID FRAME IS AT ONE HORIZONTAL POSITION.