Abstract: Temperature equalizing means for roofs. Means are provided for containing and controlling ceiling insulation so as to provide adequate air-flow communication between a first zone defined between the ceiling and the roof of a building and a second zone defined between projecting eaves of said building and soffits immediately thereunder. Such communication maintains the roof at a more nearly uniform temperature across the entire width of the roof so that during cold weather melting of snow on the roof is minimized and thereby the build-up of a ridge of ice along the eaves caused by freezing of melted snow is minimized and, consequently, leakage of melted ice under the shingles and through said roof is prevented. The device comprises a channel-shaped member positionable between the rafters of the building and spaced from the inside surface of the roof boards whereby communication between said first and second zones is not blocked by the installation of insulation on said ceiling.