Abstract: A trough structure is arranged for directing and supporting a roll of wallpaper webbing therethrough to effect wetting or adherence of glue to the wallpaper structure. The trough structure includes a forward wall spaced from a partition wall, with the partition wall spaced forwardly of a rear edge portion of the side walls to define a roll support cavity to rotatably mount the wallpaper roll therewithin. A modification of the invention includes an applicator brush in association with a trough guide roll to apply a glue material to a bottom surface of the wallpaper webbing, and may further include a supply reservoir arranged for pressurizing and directing fluid glue interiorly of the trough structure through the associated applicator roll.