A wall construction includes two mold boards spaced from each other for forming a chamber between the mold boards, a connection rod disposed between the mold boards, two connecting members attached to the connection rod and engaged through the mold boards and engaged with the mold boards for positioning the mold boards in place relative to each other, and two bracing members attached to the outer ends of the connecting members and engaged with the mold boards for further positioning the mold boards in place relative to each other, two frame members are engaged with the mold boards and secured to the mold boards with lock members.