Flexipipe included. 2(space at Eaves 1.0m intervals for 10,000mm² and at ridge 2.0m intervals for 5,000mm² Roof Space Ventilation). When used for extraction with a Flexipipe no adaptor is required. The 15 x 9 roof vent tiles are a neat, cleverly designed in-line range suitable for the most popular concrete interlocking roof tiles, with a minimum pitch of 20°.
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