Duo pitch roof with clear air path
Where underlay/breather membrane is to be installed on top of counterbattens.
Where 50mm air passageway between insulation and underlay/breather membrane occurs below the top face of the rafter.
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..
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 and Noxite Tile only) providing continuous ridge ventilation.
Alternatively: Tile vents at appropriate centres to provide equivalent of a 5mm continuous opening.
Decra Eaves Ventilation System:
Which is the right eaves ventilation system for your roofing project?
Ridge Ventilation Components:
Which is the right ridge ventilation system for your roofing project?
Tile Ventilation Components:
Read more about the range of tile ventilation components and their order codes
Tile Ventilator Spacing Charts:
Recommended tile ventilation spacing's to achieve 5,000mm², 10,000mm² or 25,000mm² per linear metre please click on the appropriate link below
Decra Classic and Noxite Tile
Decra Stratos and Oberon Tiles