Warm Roof Constructions - Duo-pitched roofs with clear air path

Duo pitch roof with clear air path
Where underlay/breather membrane is to be installed on top of counterbattens.
OR
Where 50mm air passageway between insulation and underlay/breather membrane occurs below the top face of the rafter.

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Decra Eaves Ventilation System Which is the right eaves ventilation system for your roofing project? Read more  Ridge Ventilation Components Which is the right ridge ventilation system for your roofing project? Read more Tile Ventilation Components Read more about the range of tile ventilation components and their order codes Tile Ventilator Spacing Charts Reccommended tile ventilation spacings to acheive 5,000mm², 10,000mm² or 25,000mm² per linear metre please click on the appropriate link below Decra Classic and Elegance Decra Stratos and Oberon Parctile

Requirement:

Eaves ventilation with a continuous opening equal to 25mm. Free airspace between insulation and underlay of at least 50mm.
Ridge ventilation with a continuous opening equal to 5mm at each side of ridge.
Note: in addition to a well seated ceiling, a separate vapour control layer should be used on the warm side of the insulation..

Decra Solution:

i) DecraVent 25mm Eaves Packs, each pack providing ventilation for 6 metres of eaves, installed to provide continuous ventilation to both eaves.
Alternatively: Tile vents at appropriate centres to provide equivalent of a 25mm continuous opening.

ii) Decra Universal Ridge/Hip Ventilator (all Decra tile profiles) or DecraVent D Ridge system (Decra Classic, Elegance, Parctile, only) providing continuous ridge ventilation.

Alternatively: Tile vents at appropriate centres to provide equivalent of a 5mm continuous opening.