Abstract: This invention relates to a building wall construction comprising of an already existing cement wall, plastic insulating panels, c-shaped fasteners and an interior framework composed of vertical studs and/or beams. The exterior faces of the panels are placed adjacent to the interior face of the cement wall. The insulating panels are comprised of equally spaced vertical channels along its length. Fasteners are placed inside the vertical channels and are used as the connecting element between the panels and the cement wall. The exterior faces of the studs or beams are then placed adjacent to the interior face of the fasteners. By having insulating panels between the fasteners and the studs or beams, this assures that no thermal bridge is created, thus better insulating the living space. The vertical channels allow for the fasteners and studs to be tightly nestled inside the insulating panels.

Abstract: A concrete form system is disclosed, together with a method of assembling it and particular ties useful with it. The system has a concrete form with two opposed walls and a cavity between to be filled with concrete. One wall is made of conventional wood or metal panels. The other wall is made of foam panels. Vertical joins between plywood or metal panels are directly opposite vertical joins between foam panels. The system provides ties to join the two walls and brackets or retaining members to spread the forces on the ties so they do not pull out of the foam wall.