Reply To: Moisture in the ceiling space

[Phil Squire]

Hi Alex

Sounds likely to moisture condensing on the building paper. If the temp of building paper falls below the air dew point (which may happen if the air temp falls or the roofing iron gets v cold on clear Dunedin night). this can happen if the ceiling is insulated which will mean the ceiling cavity is cooler than before.

Solutions include:

– ensure all extract vents are vented outside
– get rid of downlights (to ensure house air isn’t drawn into ceiling)
– install vents in ceiling space (or perhaps solar extractor fan – making sure you’ve got a vent for inlet air on teh opposite side of the attic
– one other solution is

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