I was wondering whether anyone could suggest a solution to a problem? Water has been leaking through the roof into the loft (wasp nest in same place presumably due to hole) and is now dropping through plaster board into hall below. Looking at the roof there appears to be a sizeable gap which is, when it rains heavily, letting water in.
What would be the best way to deal with this?
Would a sensible easy fix be a waterproof filling foam to block the gap?