Introducing Roll Form Eaves Vent Roll Out Rafter Tray; designed to keep your roof well ventilated, preventing the build-up of condensation which can cause serious damage to your home and property. Our roll out rafter tray is ideal for new build and refurbishment work. It's suitable for pitched roof eaves ventilation - perfect if you have a standard pitched roof with a pitch of 15 degrees or more and the roof void is an attic or loft space, plus it fits on roofs with rafter spacings between 400mm and 600mm centres.