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Ridge ventilation requirement

sas · 2010-07-19 14:41:06

Assume warm roof construction. Roof has some form of over rafter insulation. Therefore a counter batten and batten are required above a breathable felt. In this case is ridge ventilation or ventilating slates positioned close to the ridge required? Both options look crap on a roof imho.

19-07-2010 2:41pm

#1

sas

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Assume warm roof construction.

Roof has some form of over rafter insulation.

Therefore a counter batten and batten are required above a breathable felt.

In this case is ridge ventilation or ventilating slates positioned close to the ridge required?

Both options look crap on a roof imho.

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Comments

#2 19-07-2010 4:04pm

sydthebeat

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i cant see why....

ventilation is required (mainly in cold roofs) to exhaust water vapour / condensation from the structural roof timbers. In a warm roof the condensation point is outside this structural layer. Assuming your using a sarking board layer, with a breathable felt on top, then the battens and counter battens will create a natural vented space to off-vent this condensate.

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