An assembly supports a concrete slab foundation above a ground surface while being poured and hardened. The assembly includes forms, each of the forms having a frame. Lower rollers are mounted to each of the frames for rolling each of the forms onto the ground surface. Upper rollers are mounted to each of the frames at an elevation above the lower rollers. Upper decks are placed on top of the upper rollers. Each of the upper decks has an upper surface configured to receive the concrete while being poured and hardened. The upper rollers of each of the forms are in rolling engagement with a lower side of one of the upper decks, enabling the forms to be rolled out from under the upper decks after the slab foundation has hardened.