Abstract: A window installation and a wall panel and methods for construction thereof. The window installation includes a window liner in which a window unit can be installed. The window liner includes jambs, a header, and a sill that circumscribe the window unit and an exterior flange that depends outwardly from external edges thereof. The wall panel is a prefabricated panel that includes framing with sheathing and insulating members disposed on an exterior surface thereof and forms an opening in which the window liner is received. An external sheathing of the wall panel is formed with a larger opening dimensioned to receive the exterior flange of the window liner. The window liner and window unit can be removed from the wall panel to ease movement and transport of the wall panel and to reduce risks of breaking the window unit during manufacture and transport.

Abstract: A method for forming insulated concrete wall panels includes the step of positioning a stud wall frame in a casting bed, positioning a support panel formed from a single, monolithic section of foam insulating material on the wall frame with grooves formed in a first face therein on the stud wall frame with the grooves facing away from the wall frame and then pouring concrete in the casting bed over and around the first face of the support panel to form a layer of concrete with portions of the concrete extending into the grooves in the support panel. The concrete is allowed to cure and the wall structure is then removed from the casting bed.