During Winter when there is little wind and cold weather, like now, my
loft suffers from condensation. Ventilation of the roof space is through
four tile vents, two each side. I am not particularly bothered about it,
as it only occurs for a few weeks a year, but it would be nice to sort it.

Do the tile vents sound like adequate ventilation?

Also I have three downlighters in the bathroom and I suspect most of the
moisture is getting to the loft through the holes needed for these. But
what can I cover these with to stop the air escaping from the bathroom?


Thanks in advance for any suggestions.

Graham