Abstract: A screw anchoring device and method for preassembled aperture sealing attachment with an apertured panel to confine insulating material foamed in place between the panel and a spaced wall. The screw anchoring device includes a flat portion having a central helical screw receiving impression with a retained knock-out central area capable of being displaced by a screw. The device is secured to the apertured panel with a screw receiving impression overlying the panel aperture. The screw anchor device has one or more wing portions formed integrally with the flat portion, said wing portions diverging from the plane of the flat portion in a direction away from the screw receiving impression and adapted to be imbedded in the foamed insulating material.