Products / Owens Corning Raft-R-Mate Attic Rafter Vent

Raft-R-Mate is Owens Corning's extruded polystyrene foam rafter vent, placed between rafters to keep an air channel open from the soffit to the ridge vent above attic or cathedral-ceiling insulation, with an optional bend-down air stop and insulation block at the top plate. The September 2022 data sheet gives a 22.5 in. x 48 in. vent sized for 16 in. and 24 in. on-center framing with 22.3 sq. in. of net free air flow, and notes the vents are combustible though they meet code limits of under 75 flame spread and under 450 smoke developed.