Abstract: The insulation suspension system of the present invention provides means for supporting insulation between parallel purlins of a building roof. The system comprises a plurality of support members which are arranged in parallel spaced apart relationship adjacent the lower edges of the purlins. The support members extend transversely to the purlins and span the distance between the purlins. A clip is used to attach each end of the support members to the purlins. The support members hold the batt insulation between the purlins so that the bottom edges of the purlins are exposed to the interior of the building.