We had a new conservatory built last year, *finally* finished just before Xmas.
It leaks.
It's built into an inside corner (SE facing) of the house, replacing an old not-airtight lean-to conservatory that was there. This ascii art may give an idea (non-prop font needed):
Old
Have you considered that it might be condensation? This is just the kind of weather for that.
Edgar
+1
We had a ceiling leak in an extension that dripped about half a litre after a couple of hours of rain.
Many people looked at it but each had a different solution.
Eventually it turned out to be rain soaking through brickwork.
Rain was bouncing off the extension's roof onto a low wall. Also some rain was tracking under protective slabs on top of the wall which should have had a drip groove.
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