The convection baffle for hollow blocks increases the R-value of a hollow block when one or more convection dampers are received within passages defined through the hollow block. The convection baffle includes an upper wall having laterally opposed first and second side edges, a lower wall having laterally opposed first and second side edges, first and second laterally opposed sidewalls, and a central wall having opposed upper and lower edges. The convection baffle is substantially G-shaped. The convection baffle decreases convection current flow within the passage of the hollow block to increase the overall R-value of the hollow block.