Abstract: An eave thermal baffle for insulation adapted to be fastened on the exterior building wall and between adjacent roof framing members or other framing as may be appropriate. The baffle comprises a flat portion called the plate section adapted to lie on the top plate of the exterior wall and to be fastened thereto or placed against the exterior face of the exterior wall and to be fastened thereto. Extending vertically from this flat portion is a wall portion adapted to be fastened to the inner faces of appropriate framing members. Extending from this wall portion is a main baffle section which extends inwardly of the building and upwardly from the vertical wall. The main baffle section may also be fastened to the inner faces of a pair of appropriate framing members. Upstanding ribs extending along the sides of the main baffle section, and the main baffle section, serve to form a trough or channel for movement of ventilating air.