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  • Overall maximum length of 3600mm
  • Extend reach with additional duct, sleeve and clamps
  • Roof specific flashing required
  • Installation by a professional is recommended

Deflecto Roof Cowl venting kits are ideal for ventilation options requiring bends to navigate around obstacles within the roof cavity.

Supplied with the most efficient type of flexible ducting - Semi-Rigid aluminium ducting holds its full diameter and form when bent into shape, and also offers a superior temperature range to that of flexible foil type ducting.

Ducting expands to a straight length of 3000mm and should be extended in sections from the centre - out to each end.


The Roof Mushroom Cowl is a far superior option to the common type cowl - offering greater protection from birds, rain and rust.

We will gladly assist with returns and exchanges of this product in accordance with our returns and exchanges policy

Returns policy

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