Abstract: A window construction includes longitudinally channeled framing strips of right angular cross section attached to the four faces of a window casing or to a storm door window opening. Boundary edge portions of a pane closing the window opening are attached to the framing strips by resilient angular bead strips. The pane may comprise either a flexible plastic membrane, a rigid or semi-rigid self-supporting sheet or screening. The bead strips include two long bead flange portions extending at generally right angles from a body portion and a short rib portion extending from the outside corner at the intersection between the two bead flange portions. The rib portion and one bead flange portion are squeezed into opposed grooves in the channel portion of a framing strip to compress the pane in position against at least one inside surface of the framing strip.

Abstract: A storm window construction includes longitudinally grooved framing strips attached to the four faces of a window casing either inside or outside the window glass. Edge portions of a clear flexible plastic membrane stretched across the window opening and spaced from the glass are held within the grooves of the framing strips by bead strips to maintain the membrane under tension and provide an insulating air space between the membrane and the glass. The bead strips are oblong and can be inserted in the framing strip grooves only along the short diameter of the bead. Once in the groove the bead strip tends to rotate into wedging engagement with cylindrical inner wall portions of the groove under membrane tension to secure the bead and membrane in place. Surface portions of each bead strip intersected by its short diameter and portions of each framing strip at the entrance to the groove may be scored or toothed longitudinally to resist removal of the bead strip from the groove of the framing strip.