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apc
I was up in my loft yesterday (about lunchtime maybe) and noticed that a lot of the membrane on the north facing part was damp with drops of water on it. There's been no rain recently so I assume it's condensation. Standard Victorian terrace.
Is this a bad thing or to be expected? There's a few vents and air bricks up there but not sure how many there should be. Loft insulation was done about 10 years ago and about 200mm down so far as I can see.