CedarVent eliminates the need to drill holes in the rafters to ventilate areas trapped by construction supports. Use it in areas otherwise unventilated and considered problem areas. It is very versatile and can be used on wall surfaces between siding and wall sheathing, allowing air to move between those areas. CedarVent is an under-plywood, top-of-rafter vent easily installed during the construction of an addition or a new home. The CedarVent provides adequate ventilation in the spaces to either side of the vent placement. If you are looking for 2 3/8" wide CedarVents, click here It is a required vent product when your soffit to ridge air flow is blocked by a skylight or dormer. CedarVent easily allows air movement in those trapped areas. DCI Products is the manufacturer of CedarVent. You can find more information about CedarVent here: https://dciproducts.com/cedarvent/ It eliminates the need to drill holes in the rafters to ventilate areas trapped by construction supports. Use it in areas otherwise unventilated and considered problem areas. It is very versatile and can be used on wall surfaces between siding and wall sheathing, allowing air to move between those areas. Please use the Size option below to select the thickness you require.