Abstract: An insulation sheet for concrete sandwich wall panels comprising a sheet base composed substantially of expanded cellular foam and having opposed base surfaces. Protrusions on rigid plastic inserts molded into the sheet base extend from each of the base surfaces. Each of the protrusions has a narrow waist into which concrete flows to anchor the concrete onto the sheet. Narrow ducts extend through the insulation sheet.

Abstract: An insulation sheet for concrete sandwich wall panels comprising a sheet base composed substantially of expanded cellular foam and having opposed base surfaces. Protrusions integral with the sheet base extend from each of the base surfaces from a footprint at the base surface to a distal surface away from the base surface. Each of the protrusions has a cross-sectional shape such that a width of the distal surface is greater than a width of the footprint, that is, mushroom-shaped. Narrow ducts extend through the insulation sheet. Optionally, the protrusion distal surfaces are rounded.

Abstract: A modular construction system and method of use for creating a concrete wall system which has a wall system which complies with a modular construction system. The system uses wall form panels having connectors and structural tie plates. The wall form panels have interlocking protrusions around the edges such that the panel is reversibly symmetric. The panels are specific lengths to minimize the number of panels required to achieve a set length. The structural tie plates have connectors to tie in with the wall form panels and in addition carry and position reinforcement bars with the wall. The modular wall system ensures ease and integrity of alignment of the wall form panels by the self-aligning structural tie elements. In a preferred embodiment, a footing is continuously integral with the wall. A heat retention cap form allows for a more uniform cure temperature in adverse temperatures.