Insulation for Low Pitch Roof and Prevent Condensation


Postby Baker123 » Mon Jan 09, 2017 9:40 pm

I've recently moved into a house built in the 70's. It has low eaves on the roof, the max pitch is about 5 foot. The insulation is over 270mm and I have discovered some white mould and condensation on the black roof lining and a small puddle on top of a plastic box. I think there is too much insulation in the loft causing the condensation but cannot find anywhere online to say how much the insulation should be reduced by for a non-standard roof. The 'best practice' is 270mm but surely that's for a normal height roof? Any ideas how much I should take out? Also - how can I tell if the roof is ventilated enough? It feels like there is a draft when I'm up it but where would I find the roof vents to make sure the insulation isn't covering them?
Baker123
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