^^i like the foam idea - may give it a go.....the new roofer is coming next week - see if he can see any problems on the actual roof when he has a proper look under the tiles etc.....if not - its got to be this gap.
It's a tile roof, textured to the touch, with a curve type shape in them - yes i believe the roof is felted underneath. We've had constant rain for the last 24-48 hours and no drips - its definately when the rain is driving in....
Just looking for a bit of advice and direction on this ongoing problem.
Basically bought my house last year - knowing there had been water in the roof of the dorma extension (has a flat roof joining a small pitch with 2 identical velux windows side by side) water falls from a lowered beam...