RafterVent 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. RafterVent is an under-plywood, top-of-rafter vent easily installed during the construction of an addition or a new home. The RafterVent provides adequate ventilation in the spaces to either side of the vent placement. If you are looking for 2 3/8" wide RafterVents, click here It is a required vent product when your soffit to ridge air flow is blocked by a skylight or dormer. RafterVent easily allows air movement in those trapped areas. DCI Products is the manufacturer of RafterVent. You can find more information about RafterVent here: https://dciproducts.com/raftervent/ 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 us the Size option below to select the thickness you require.