Abstract: A pipe-supporting device adapted to receive and support an exposed pipe on a roof has a substantially flat bottom for resting on the roof and an upwardly tapered structure secured on and rising from the base to provide a pipe positioning and supporting structure which substantially equally distributes the weight of the supported pipe over the area of the base in contact with the roof. The pipe positioning and supporting structure has a pocket for positioning a pipe therein and the pipe is supported in the pocket by at least one roller positioned in at least one receiving trough. As the pipe expands or contracts, it rides on the roller which rotates within the trough.