roll not shown interim storage before subsequent application of adhesive in installation of the underlay to a carpet an underlay of a width corresponding to that of the carpet is first selected this may be a single width or several strips when laid side to side along their longitudinal dimension corresponding to the width of the carpet for ease of handling the underlay is preferably fabricated in three foot widths however widths of nine feet twelve feet or fifteen feet can be readily accommodated any necessary trimming may be done prior to application of the underlay to the floor the underlay is placed face down in a location selected one layer of the release film for example layer 13 is removed from the underlay and the adhesive side of the underlay is place on the floor the other release film is then removed and the back or underside of the carpet is adhered to the underlay the underlay is first adhered to the floor in the exact area in which the carpet is to be installed with the top release layer in place thereafter the exposed release foil is cut along the fold line and peeled off to expose one half of the adhesive the carpet is then rolled out or folded back on the adhesive surface which contacts the back side of the carpet the remainder of the polymer release film is peeled.