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System ridge ventilation - art. 2005, allowing for very efficient ventilation of the roof. Recommended especially in the case of gable roofs, where it is mounted along the entire length of the ridge. Leave a ventilation gap in the ridge beforehand. The special design of the underside of the ridge ventilation limits the blown of snow and rain as well as the penetration of insects. The ridge ventilation is only available in black. It is covered with shingles during installation. The dimensions of the ridge ventilation are 50 x 30 cm. The product is delivered with fixing screws and plugs.