Flue problem . How best to get it looked at ?

[samwardill]

I’m getting water in my boiler which I think is coming from the flue (pictured). Is it likely that the issue is with the flue itself or the roof junction? I guess if it is the roof then I’m better asking a roofer rather than a heating engineer - right?

 

[ShaunCorbs]

I suspect it’s coming through via the flashing eg running down internally on the outside of the flue eg going through the rubber you might be able to get some black jack roofing mastic

For the rubber to metal joint