An assembly for dispensing sheeting from a roll comprises a main tube with a lower support extending from the main tube and configured to support the roll, and with an upper support extending from the main tube at a distance from the lower support. The lower support and the upper support secure opposite ends of the roll, such that the roll can rotate while sheeting is dispensed from the roll. In some embodiments, the assembly further includes one or more arms pivotally connected to the main tube and configured to partially enclose the roll and/or a securing member (or rod) configured to engage the roll along its length. In some embodiments, the assembly further includes a connection tube pivotally connected to the main tube and configured to removably attach the assembly to a vehicle.