15×9 Tile Vents are a cleverly designed in-line range suitable for the most popular concrete interlocking roof tiles, with a minimum pitch of 20°. The built-in downpipe provides a direct ventilation path into the roof space, providing 10,000mm2 of ventilation coverage to help reduce the build-up of mould growth and structural damage, caused by damp, poorly ventilated roofs. While it can also be used as a terminal for soil and ventilation pipes and mechanical extraction systems too when used with an adaptor and Flexipipe. Profile-Line 15×9 Tile Vents have been specially developed to suit leading tile manufacturers, including Redland 49, Marley Ludlow Plus, Sandtoft Standard Pattern, and Forticrete V2 interlocking tiles. Available in a wide variety of colours to match the roof tiles.